int bal1 = 100;
int bal2 = 100;
int bal3 = 100;


void setup(){
  size(500,500);
}

void draw(){
  background(100,100,100);
  ellipse(200,bal1,50,50);
  ellipse(300,bal2,50,50);
  ellipse(400,bal3,50,50);
  bal1 = bal1 + 1;
  bal2 = bal2 + 2;
  bal3 = bal3 + 3;
  if(bal1 > 450){
  bal1 = 100;
  }
if(bal2 > 450){
bal2 = 100;
}  
if(bal3 > 450){
bal3 = 100;
}


}