size(960,540);   
//fullScreen();  
float x = width/2;    
float y = height/2;    
float n = height/20;    
 
// horizontale ellipsen  
  background(#E6FBFF);  
for (float i = 1; i < 6; i = i + 1) {  
  fill(color(random(100, 225), random(0, 100), random(100, 200), 100)); 
  ellipse(x, y+n*1.5*i, 15*n, n); //naar beneden   
  ellipse(x, y-n*1.5*i, 15*n, n); //naar boven  
}        
   
//verticale ellipsen      
for (float i = 1; i < 6; i = i + 1) {    
  fill(color(random(0, 100), random(100, 255), random(100, 200), 100)); 
  ellipse(x+n*1.5*i, y, n, 15*n); //naar rechts  
  ellipse(x-n*1.5*i, y, n, 15*n); //naar links      
}