w5 hw - OpenProcessing

mySketch
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int circles = 100; 
float [] speedy = new float [circles];
float [] speedx= new float [circles]; 
float [] positiony =  new float [circles];
float [] positionx = new float [circles];
float x , y , w , h, ballw;
boolean button = false; 
​
void setup () {
  size (500, 700);
  x = width/2-80;
  y = height*2/3;
  h = 40;
  w = 160;
  ballw = 7;
  
  for (int i = 0; i < positiony.length; i++) {
    positiony[i] = random(height); 
    speedy[i] = 1;
  }
  
  for (int i = 0; i < positionx.length; i++) {
    positionx[i] = random(height);
    speedx[i] = 1;
  }
};
​
void draw () {
   if (button) {
     background (#4286f4); //blue
   } else {
     background (#4c1703); //red
   }
   
   fill (#ffffff);
   rect (x,y,w,h);
   
   
   for (int i = 0; i < positiony.length; i++) {
     
     fill (#ffec44); //yellow
     ellipse (positionx[i], positiony[i], ballw, ballw);
    positiony[i] = positiony[i] + speedy[i];    
    positionx[i] = positionx[i] + speedx[i];
    
     if ((positionx[i] > x-ballw) && (positionx[i] < x+w+ballw) && (positiony[i] > y-ballw) && (positiony[i] < y+h+ballw)) {
      button = !button; 
      if ( ( positiony[i] < y) || ( positiony[i] > y+h)) {   
        speedy[i] = speedy[i] * -1;    
​
      } else if ((positionx[i] < x) || (positionx[i] > x+w)) {  
        speedx[i] = speedx[i] * -1;    
      }
      if (( positiony[i]>height) || ( positiony[i]<0)) { 
      speedy[i] = speedy[i] * -1;
    } 
    if ((positionx[i]>width) || (positionx[i]<0)) {
      speedx[i] = speedx[i] * -1;
   }
}
}
}
​