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else if ((pictureBox04.Location.X >= 622) && (pictureBox04.Location.Y == 527))
            {
                timer01.Interval = 1;
                pictureBox04.Left = pictureBox04.Left - 1;
            }					

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// Alle if-else-Abfragen sind mal in einer Funktion verpackt. Ich habe zum Beispiel x U-Bahnzüge - dargestellt als PictureBox. 

 private void timerU1_TickZug01(object sender, EventArgs e)
        {
// U-Bahnzug01 - dargestellt durch PictureBox01
            if ((textBox1.Text == "00:03") || (textBox1.Text == "05:03") || ... || (textBox1.Text == "23:55"))             {
                pictureBoxU1Zug01.Visible = true;
                pictureBoxU1Zug01.Location = new System.Drawing.Point(775, 527);
                         }

                else if (pictureBoxU1Zug01.Location == new System.Drawing.Point(748, 527))
                {
                    timerU1Zug01.Interval = 400;
                    pictureBoxU1Zug01.Left = pictureBoxU1Zug01.Left - 1;
                }

                //... einige "else if"

                else
                {
                    timerU1Zug01.Interval = 1;
                    pictureBoxU1Zug01.Top = pictureBoxU1Zug01.Top - 1;
                }

// U-Bahnzug02 - dargestellt durch PictureBox02
 if ((textBox1.Text == "00:10") || (textBox1.Text == "05:10") || ... || (textBox1.Text == "23:25"))
            {
                pictureBoxU1Zug02.Visible = true;
                pictureBoxU1Zug02.Location = new System.Drawing.Point(775, 527);
            }

            else if (pictureBoxU1Zug02.Location == new System.Drawing.Point(748, 527))
            {
                timerU1Zug01.Interval = 400;
                pictureBoxU1Zug02.Left = pictureBoxU1Zug02.Left - 1;
            }

            //... einige "else if"

            else
            {
                timerU1Zug01.Interval = 1;
                pictureBoxU1Zug02.Top = pictureBoxU1Zug02.Top - 1;
            }

// U-Bahnzug xyz - dargestellt durch PictureBox xyz					

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 public void timerU1_TickZug01(object sender, EventArgs e)
        {
            List<int> listsimulation = new List<int>();
            listsimulation.Add(775);
            listsimulation.Add(527); 
            listsimulation.Add(748);
            listsimulation.Add(527);
            listsimulation.Add(667);
            listsimulation.Add(527);
 
if ((textBox1.Text == "05:25") || ... || (textBox1.Text == "23:40"))
            {
                pictureBoxU1Zug04.Visible = true;
                pictureBoxU1Zug04.Location = new System.Drawing.Point(listsimulation[0], listsimulation[1]);
            }

                else if (pictureBoxU1Zug04.Location == new System.Drawing.Point(listsimulation[2], listsimulation[3]))
                {
                    timerU1Zug01.Interval = 400;
                    pictureBoxU1Zug04.Left = pictureBoxU1Zug04.Left - 1;
                }
// ...					

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        List<Point> pointList;
        List<PictureBox> picBoxList;
        public Form1()
        {
            InitializeComponent();
            BuildPictureBoxList();
            BuildPointList();
        }
        private void BuildPointList()
        {
            pointList = new List<Point>();
            pointList.Add(new Point(0, 0));
            // [...]    
        }
        private void BuildPictureBoxList()
        {
            picBoxList = new List<PictureBox>();
            picBox1.Tag = pointList[0]; // start location
            picBoxList.Add(picBox1);
            // [...]
        }
        private void TimerTick(object sender, EventArgs e)
        {
            Move();
        }
        private void Move()
        {
            foreach (PictureBox picBox in picBoxList)
            {
                int i = pointList.IndexOf((Point)picBox.Tag);
                i++;
                if (i >= pointList.Count)
                    i = 0;
                picBox.Location = pointList[i];
                picBox.Tag = pointList[i];
            }
        }					

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 private void BuildPointList()
        {
            pointList = new List<Point>();
            pointList.Add(new Point(775, 527));
            pointList.Add(new Point(748, 527));
            pointList.Add(new Point(667, 527));
            // mehr Punkte
        }

private void BuildPictureBoxList()
        {
            picBoxList = new List<PictureBox>();
            pictureBoxU1Zug01.Tag = pointList[0];
            picBoxList.Add(pictureBoxU1Zug01);
            picBoxList.Add(pictureBoxU1Zug02);
        }

public void timerU1_TickZug01(object sender, EventArgs e)
        {
if ((textBox1.Text == "00:03") || ... || (textBox1.Text == "23:55"))             
{
 {
                    pictureBoxU1Zug01.Visible = true;
                    picBoxList[0].Location = pointList[0]; // statt vorher pictureBoxU1Zug02.Location = new System.Drawing.Point(775, 527);
                }

                else if (picBoxList[0].Location == pointList[1]) // statt vorher else if (pictureBoxU1Zug02.Location == new System.Drawing.Point(748, 527))
                {
                    timerU1Zug01.Interval = 400;
                    pictureBoxU1Zug01.Left = pictureBoxU1Zug01.Left - 1;
                }					

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private void Move()
        {
            foreach (PictureBox picBox in picBoxList)					

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            {
                int i = pointList.IndexOf((Point)picBox.Tag);					

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                i++;
                if (i >= pointList.Count)
                    i = 0;					

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                picBox.Location = pointList[i];
                picBox.Tag = pointList[i];
            }
        }					

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        private void Move()
        {
            foreach (PictureBox picBox in picBoxList)
            {
                int i = pointList.IndexOf(picBox.Location);
                i++;
                if (i >= pointList.Count)
                    i = 0;
                picBox.Location = pointList[i];
            }
        }					

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private void TimerTick(object sender, EventArgs e)
        {
            Move();
        }					

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public void timerU1_TickZug01(object sender, EventArgs e)
{
Move();
}					

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       private void Move()
        {
            foreach (PictureBox pictureBoxU1Zug01 in picBoxList) 
            {
                int i = pointList.IndexOf(pictureBoxU1Zug01.Location); 
                i = 0;
                if (i >= pointList.Count)
                { i = 0;
                }

                int j = 0; // Index für PictureBoxen - wenn z.B. j=0, dann wird PictureBox an der Stelle 0 in picBoxList aufgerufen
                
                if (picBoxList[j].Location == pointList[i])
                {
                    timerU1Zug01.Interval = 400; // timerU1Zug01 ist der allgemeine Timer für alle PictureBoxen dieser Linie
                    picBoxList[j].Left = picBoxList[j].Left - 1;
                    i++;
                }
                    

                else if (picBoxList[j].Location == pointList[i])
                {
                    timerU1Zug01.Interval = 400;
                    picBoxList[j].Left = picBoxList[j].Left - 1;
                    i++;
                }
//...
                j++; // PictureBox-Index wird um 1 erhöht
            }
}					

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if (picBoxList[0].Location == pointList[0])
    picBoxList[0].Left -= 1;					

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       private void DoMove() // umbenannt, damit keine Konflikte des Namens wegen entstehen.
        {
            foreach (PictureBox picBox in picBoxList) // umbenannt, da der spezifizierende Name total irreführend ist. schau dir vlt nochmal foreach schleifen an^^
            {
                int i = pointList.IndexOf(picBoxLocation); 
/*
 * du weist "i" hier den index der position deiner aktuellen picBox zu. 
 * heißt: pointList[i] ist die Position der picBox.
 * sollte i == -1 sein heißt dies, dass er den Punkt nicht in der Liste finden kann.
 * das würde heißen, dass deine liste unvollständig ist^^
 */
                i = 0;  //warum nun auf 0 setzen? raus damit, dringend^^

/* 
 * warum hast du diese abfrage drin?
 * du weißt doch, dass i = 0 ist. warum sollte i also größer sein als pointList.Count?
 * ich hatte dies eingebaut um wieder von vorne anzufangen, sollte ich die pointList durchhaben, da ich vorher noch ein "i++;" geschrieben hatte.
 */
                if (i >= pointList.Count) 
                { 
                    i = 0; 
                }

                int j = 0; // du setzt JEDES mal j = 0, das heißt, dass du bei jedem durchlauf der schleife die selbe box verwendest..
                
                if (picBoxList[j].Location == pointList[i]) // überflüssige abfrage, du kennst die position der picBox: pointList[i](würdest du i nicht wieder auf 0 setzen...)
                {
                    timerU1Zug01.Interval = 400; // timerU1Zug01 ist der allgemeine Timer für alle PictureBoxen dieser Linie
                    picBoxList[j].Left = picBoxList[j].Left - 1; // Warum arbeitest du hier nicht mit der pointList?
                    i++; // warum? O_o
                }
                    
/*                ÜBERFLÜSSIG
 *                else if (picBoxList[j].Location == pointList[i])
 *                {
 *                    timerU1Zug01.Interval = 400;
 *                    picBoxList[j].Left = picBoxList[j].Left - 1;
 *                    i++; 
 *                }
 * warum 2 mal die selbe if abfrage? dazu noch mit else if und dem selben code...^^
 */

// "picBoxList[j].Location und pointList[i], wobei j und i bei dir jedesmal 0 sind, wird sich nicht ändern, egal wie oft du es abfragst...^^

                j++; // PictureBox-Index wird NICHT um 1 erhöht, da du am anfang j = 0 setzst - und das jedesmal.
            }
}					

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   private void DoMove()
        {
            int j = 0;
            foreach (PictureBox picBox in picBoxList) 
            {
                for (int i = pointList.IndexOf(picBox.Location); i <= pointList.Count; i++) // i darf nicht höher sein, als die Anzahl der Werte in der Liste
                {
                    if (picBoxList[j].Location == pointList[i])
                    {
                        // beim ersten Durchlauf ist j gleich 0. Es wird der Wert an der Stelle 0 von List " private void BuildPictureBoxList()" genommen. 
                        // i ist ebenfalls gleich 0. Es wird der Wert an der Stelle 0 von List "private void BuildPointList()" genommen.
                        // Also steht hier z.B. beim 1.Durchlauf "pictureBoxU1Zug01.Location == new System.Drawing.Point(775, 527)"
                        timerU1Zug01.Interval = 400;// timerU1Zug01 ist der allgemeine Timer für alle PictureBoxen dieser Linie
                        picBoxList[j].Left = picBoxList[j].Left - 1; //pictureBoxU1Zug01.Left = pictureBoxU1Zug01.Left - 1
                    }
                    else // falls das erste if-Argument nicht zutrifft wird das else Argument genommen
                    {
                        timerU1Zug01.Interval = 1;
                        picBoxList[j].Top = picBoxList[j].Top - 1;
                    }
                }
                
                j++; // Nachdem die for-Schleife am Ende der pointList angekommen ist, wird aus ihr rausgegangen, der j-Index wird um 1 erhöht und es beginnt ein neuer Durchlauf
                // Da j um 1 erhöht wird ist picBoxList[j] dann dementsprechend pictureBoxU1Zug02
                // die foreach-Schleife beginnt nach dem 1.Durchlauf wieder von neu
            }
        }					

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 else if (picBox.Location == pointList[i])
                        {
                            for(int z=0; z<8; z++)
                            {
                                    timerU1Zug01.Interval = 400;
                                    picBox.Left = picBox.Left - 1;  
                                    i++;
                            }
                        }					

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 private void BuildPointList()
        {
            pointList = new List<Point>();
            pointList.Add(new System.Drawing.Point(775, 527));
            pointList.Add(new System.Drawing.Point(748, 527));
            pointList.Add(new System.Drawing.Point(667, 527));
            pointList.Add(new System.Drawing.Point(621, 516));
            pointList.Add(new System.Drawing.Point(621, 452));
            pointList.Add(new System.Drawing.Point(621, 379));
            pointList.Add(new System.Drawing.Point(621, 294));
            pointList.Add(new System.Drawing.Point(621, 218));
            pointList.Add(new System.Drawing.Point(621, 163));
            pointList.Add(new System.Drawing.Point(621, 111));
            pointList.Add(new System.Drawing.Point(657, 105));
            pointList.Add(new System.Drawing.Point(724, 105));
            pointList.Add(new System.Drawing.Point(782, 105));
            pointList.Add(new System.Drawing.Point(839, 105));
            pointList.Add(new System.Drawing.Point(896, 105));
            pointList.Add(new System.Drawing.Point(953, 105));
            pointList.Add(new System.Drawing.Point(1010, 105));
            pointList.Add(new System.Drawing.Point(1065, 105));
            pointList.Add(new System.Drawing.Point(1122, 105));
            pointList.Add(new System.Drawing.Point(1193, 105)); // Stelle 19
            pointList.Add(new System.Drawing.Point(622));
            pointList.Add(new System.Drawing.Point(527));
            pointList.Add(new System.Drawing.Point(1224));
            pointList.Add(new System.Drawing.Point(105));
            pointList.Add(new System.Drawing.Point(1225, 105));
        
        }

        private void BuildPictureBoxList()
        {
            picBoxList = new List<PictureBox>();
            picBoxList.Add(pictureBoxU1Zug01);
            picBoxList.Add(pictureBoxU1Zug02);
            picBoxList.Add(pictureBoxU1Zug03);
            picBoxList.Add(pictureBoxU1Zug04);
            picBoxList.Add(pictureBoxU1Zug05);
            picBoxList.Add(pictureBoxU1Zug06);
        }

        private void BuildTimetableList()
        {
            timetableList = new List<String>();
            timetableList.Add("04:59"); 
        }

        private void TimerTick(object sender, EventArgs e)
        {
            DoMove();
        }

        private void DoMove()
       {
            foreach (PictureBox picBox in picBoxList)
            {
                int i = pointList.IndexOf(picBox.Location) + 1;
                {
                    i =0;
                    if (textBox1.Text == timetableList[0])
                    {
                        {
                            picBox.Visible = true;
                            picBox.Location = pointList[i]; // pointList-Wert an der Stelle 0
                            i++; 
                        }

                        if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 1
                        {
                                    timerU1Zug01.Interval = 400;
                                    picBox.Left = picBox.Left - 1;  
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 2
                        {
                            timerU1Zug01.Interval = 400;// timerU1Zug01 ist der allgemeine Timer für alle PictureBoxen dieser Linie
                            picBox.Left = picBox.Left - 1; //pictureBoxU1Zug01.Left = pictureBoxU1Zug01.Left - 1
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 3
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Top = picBox.Top - 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 4
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Top = picBox.Top - 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 5
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Top = picBox.Top - 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 6
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Top = picBox.Top - 1; 
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 7
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Top = picBox.Top - 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 8
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Top = picBox.Top - 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 9
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Top = picBox.Top - 1;
                            i++;
                        }

                            
                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 10
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Left = picBox.Left + 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 11
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Left = picBox.Left + 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 12
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Left = picBox.Left + 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 13
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Left = picBox.Left + 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 14
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Left = picBox.Left + 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 15
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Left = picBox.Left + 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 16
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Left = picBox.Left + 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 17
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Left = picBox.Left + 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 18
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Left = picBox.Left + 1;
                            i++;
                        }

                        else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 19
                        {
                            timerU1Zug01.Interval = 400;
                            picBox.Left = picBox.Left + 1;
                            i++;
                        }

                     else if ((pointList >= [i]) && (pointList == [i+1]))
                      {
                      i++;
                      i++; 
                            
                      timerU1Zug01.Interval = 1;
                      picBox.Left = picBox.Left - 1;
                      }

                      else if ((pointList <= [i]) && (pointList == [i + 1])) // Stellen 23 und 24
                      {
                      i++; 
                      i++;
                            
                      timerU1Zug01.Interval = 1;
                      picBox.Left = picBox.Left + 1;
                      }

                         else if (picBox.Location == pointList[i]) // pointList-Wert an der Stelle 19
                        {
                            picBox.Left = picBox.Left + 0;
                            i++;
                        }

                        else
            {
                timerU1Zug01.Interval = 1;
                picBox.Top = picBox.Top - 1;
            }
                   
                    }
                }

            }
        }					

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else if (((pictureBoxU4Zug01.Location.X >= 96) && ...) || ((... && (pictureBoxU4Zug01.Location.X <= 745)))
                {
                    if ((pictureBoxU4Zug01.Location == pointListU4[4]) ... || (pictureBoxU4Zug01.Location == pointListU4[12]))
                    {
                        pictureBoxU4Zug01.Left = pictureBoxU4Zug01.Left + 1;
                        timerU4Stop.Interval = 500; // Hier ist die Haltedauer eingetragen
                    }					

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9:

picBox.Tag = false;
BackgroundWorker bgw = new BackgroundWorker();
bgw.DoWorkEvent += myevent(); //simples wait darein
bgw.FinishEvent += myFinish(); // hier den bool wieder auf true setzen
//...
TimerTick(bla,bla)
{
if ((bool)picBox.Tag)
...