float slow_circle_x = 0;
float fast_circle_x = 0;
void setup() {
  size(400,400);
  noStroke();
  fill(#C1FF3E);
}

void draw() {
  background(#1BB1F5);
  
  ellipse(slow_circle_x,50,50,50);
  slow_circle_x = slow_circle_x +1;
  
  ellipse(fast_circle_x,50,50,50);
  fast_circle_x = fast_circle_x +5;
  
  if(slow_circle_x>400) {
    slow_circle_x=0;
  }
    if(fast_circle_x>400) {
    fast_circle_x=0;
  }
}