2. Timer timer;
3. //int timerData[]= {31,55,30,56,29,56};
4. int timerData[]= {3,5,3,5,2,5};
5. int dataCounter = 0;
6. 
   
7. void setup(){
8.  size(400,400);
9.  timer = new Timer(timerData[0]);
10.   timer.start(); 
11.   
12. }
13. 
    
14. void draw() {
15.   
16.   if(timer.isFinished()){
17.     if(timerData[1] || timerData[3] || timerData[5]){   
18.     background(255,timerData[dataCounter], timerData[dataCounter]);
19.   dataCounter = (dataCounter + 1) % timerData.length;
20.   timer = new Timer(timerData[0]*1000);
21.   println(timerData[dataCounter]);
22.   timer.start();
23.   } else if (timerData[0] ) timerData[2] || timerData[4]){   
24.     background(timerData[dataCounter],255, timerData[dataCounter]);
25.   dataCounter = (dataCounter + 1) % timerData.length;
26.   timer = new Timer(timerData[0]*1000);
27.   println(timerData[dataCounter]);
28.   timer.start();
29.   }
30.  }
31.   
32. }
34. class Timer {
35.  
36.   int savedTime; // When Timer started
37.   int totalTime; // How long Timer should last
38.   
39.  
40.   
41.   Timer(int totalTime_) {
42.     totalTime = totalTime_;
43.   }
44.   
45.   // Starting the timer
46.   void start() {
47.     // When the timer starts it stores the current time in milliseconds.
48.     savedTime = millis(); 
49.   }
50.   
51.   // The function isFinished() returns true if "totalTime" has passed. 
52.   // The work of the timer is farmed out to this method.
53.   boolean isFinished() { 
54.     // Check how much time has passed
55.     int passedTime = millis()- savedTime;
56.     if (passedTime > totalTime) {
57.       return true;
58.     } else {
59.       return false;
60.     }
61.   }
62. 
    
63. }

I also want all of the rectangles to stay on the screen instead of all disappearing when the timer starts over, I am new at this and don't know how to have that happen. 

Thanks in advance

2. Timer_Car timer_Car;
3. Car[] horizontalCar;
4. Car[] verticalCar;
5. int totalHorizontalCar = 0;
6. int totalVerticalCar = 0;
7. 
   
8. 
   
9. 
   
10. void setup() {
11.  size(600, 600);
12.  smooth();
13. 
    
14.  
15.  timer_Car = new Timer_Car(6000);
16.  timer_Car.start();
17. 
    
18. horizontalCar = new Car[50];
19. verticalCar = new Car [20];
20. 
    
21.  for(int i = 0; i < horizontalCar.length; i ++){
22.   horizontalCar[i] = new Car(color(random(255), random(255), random(255)), 0, i*2, i/20);
23.  } 
24.   for(int j = 0; j < verticalCar.length; j ++){
25.    verticalCar[j] = new Car(color(random(255), random(255), random(255)),j*2, 0, j/20);
26.  } 
27.   
28.   
29. }
30. 
    
31. void draw() {
32.   
33.  background(255);
34. 
    
35.  if(timer_Car.isFinished()){
36.    for(int i = 0; i < horizontalCar.length; i++){
37.       horizontalCar[totalHorizontalCar] = new Car(color(random(255), random(255), random(255)), -10, random(0, height), random(1, 3));
38.       totalHorizontalCar ++;
39.    }
40.    for(int j = 0; j < verticalCar.length; j ++){
41.       verticalCar[totalVerticalCar] = new Car(color(random(255), random(255), random(255)),random(0, width), 0, random(1, 3));
42.       totalVerticalCar ++;
43.    }
44.   
45.   if(totalHorizontalCar >= horizontalCar.length){
46.    totalHorizontalCar = 0;
47.   } 
48.   if(totalVerticalCar >= verticalCar.length){
49.   totalVerticalCar = 0;
50.   } 
51.   timer_Car.start();
52.   } 
53.   
54.   for (int i = 0; i < horizontalCar.length; i ++ ) { 
55.     horizontalCar[i].moveHorizontal();
56.     horizontalCar[i].display();
57.   }
58.   
59.   for (int j = 0; j < verticalCar.length; j ++ ) { 
60.     verticalCar[j].moveVertical();
61.     verticalCar[j].display();
62.   }
63.   
64. }
66. class Car { 
67.   color c;
68.   float xpos;
69.   float ypos;
70.   float xspeed;
71.   float yspeed;
72. 
    
73.   Car(color c_, float xpos_, float ypos_, float xspeed_) {
74.     c = c_;
75.     xpos = xpos_;
76.     ypos = ypos_;
77.     xspeed = xspeed_;
78.   }
79. 
    
80.   void display() {
81.     rectMode(CENTER);
82.     stroke(0);
83.     fill(c);
84.     rect(xpos,ypos,20,10);
85.   }
86. 
    
87.   void moveHorizontal() {
88.     xpos = xpos + xspeed;
89.     if (xpos > width) {
90.       xpos = 0;
91.     }
92.   }
93.   
94.   void moveVertical() {
95.     ypos = ypos + yspeed;
96.     if (ypos > height) {
97.       ypos = 0;
98.     }
99.   }
101. class Timer_Car {
102.  
103.   int savedTime; // When Timer started
104.   int totalTime; // How long Timer should last
105.  
106.   
107.   Timer_Car(int tempTotalTime) {
108.     totalTime = tempTotalTime;
109.   }
110.   
111.   // Starting the timer
112.   void start() {
113.     // When the timer starts it stores the current time in milliseconds.
114.     savedTime = millis(); 
115.   }
116.   
117.   // The function isFinished() returns true if "totalTime" has passed. 
118.   // The work of the timer is farmed out to this method.
119.   boolean isFinished() { 
120.     // Check how much time has passed
121.     int passedTime = millis()- savedTime;
122.     if (passedTime > totalTime) {
123.       return true;
124.     } else {
125.       return false;
126.     }
127.   }
128. 
     
129. }

}

Please help! and thanks in advance