Code

Ball[] ball = new Ball[15]; int a,b,c;

void setup() {

 size(1280,1024);
 smooth();
 noStroke();
 //frameRate(5);
 colorMode(HSB[[Farbe#Farbräume|Hue Saturation Brightness]] Colorspace,360,100,100,100);
 
 a = 500;
 b = 400;
 c = 40;
 
 for (int i=0; i < 5; i++) {
   ball[i] = new Ball();
   
   ball[i].x = random(ball[i].g,a-ball[i].g);
   ball[i].y = random(ball[i].g,height-ball[i].g);
   
   ball[i].h = (int)random(360);
   
   ball[i].vx = random(1,10);
   ball[i].vy = random(1,10);
 }
 
 for (int i=5; i < 10; i++) {
   ball[i] = new Ball();
   
   ball[i].x = random(a+c+ball[i].g,a+c+b-ball[i].g);
   ball[i].y = random(ball[i].g,height-ball[i].g);
   
   ball[i].h = (int)random(360);
   
   ball[i].vx = random(1,10);
   ball[i].vy = random(1,10);
 }
 
 for (int i=10; i < ball.length; i++) {
   ball[i] = new Ball();
   
   ball[i].x = random(a+c+b+c+ball[i].g,width-ball[i].g);
   ball[i].y = random(ball[i].g,height-ball[i].g);
   
   ball[i].h = (int)random(360);
   
   ball[i].vx = random(1,10);
   ball[i].vy = random(1,10);
 }

}

void draw() {

 background(0);
 fill(255);
 rect(a,0,c,height);
 fill(255);
 rect(a+c+b,0,c,height);
 
 for (int i=0; i < 5; i++) {
   ball[i].maleBall();
   
   ball[i].x = ball[i].x + ball[i].vx;
   ball[i].y = ball[i].y + ball[i].vy;
   
   if (ball[i].x <= 0+ball[i].g/2 || ball[i].x >= a-ball[i].g/2) {
     ball[i].vx = -ball[i].vx;
   }
   if (ball[i].y <= 0-ball[i].g) {
     ball[i].y = height;
   }
   if (ball[i].y >= height+ball[i].g) {
     ball[i].y = 0-ball[i].g;
   }
 }
 
 for (int i=5; i < 10; i++) {
   ball[i].maleBall();
   
   ball[i].x = ball[i].x + ball[i].vx;
   ball[i].y = ball[i].y + ball[i].vy;
   
   if (ball[i].x <= a+c+ball[i].g/2 || ball[i].x >= a+c+b-ball[i].g/2) {
     ball[i].vx = -ball[i].vx;
   }
   if (ball[i].y <= 0-ball[i].g) {
     ball[i].y = height;
   }
   if (ball[i].y >= height+ball[i].g) {
     ball[i].y = 0-ball[i].g;
   }
 }
 
 for (int i=10; i < ball.length; i++) {
   ball[i].maleBall();
   
   ball[i].x = ball[i].x + ball[i].vx;
   ball[i].y = ball[i].y + ball[i].vy;
   
   if (ball[i].x <= a+c+b+c+ball[i].g/2 || ball[i].x >= width-ball[i].g/2) {
     ball[i].vx = -ball[i].vx;
   }
   if (ball[i].y <= 0-ball[i].g) {
     ball[i].y = height;
   }
   if (ball[i].y >= height+ball[i].g) {
     ball[i].y = 0-ball[i].g;
   }
 }

}

Objekt Ball

class Ball {

 int g; //Größe
 float x,y; //Position
 
 int h,s,b,a; //Farbe
 
 float vx,vy; //Geschwindigkeit
 
 Ball() {
   g = 100;
   
   s = 100;
   b = 100; 
 }
 
 void maleBall() {
   fill(h,s,b);
   ellipse(x,y,g,g);
 }

}