int x = 70;

void setup(){
  size(300, 200);
  noStroke();
}

void draw(){
  background(10, 200, 240);
  if(keyPressed && (key == CODED)){
   if(keyCode == LEFT){
   x--;
   }else if(keyCode == RIGHT){
   x++;
   }
  }
  fill(255);
  ellipse(x-15, 120, 45, 45); 
  ellipse(x, 90, 60, 60);
  ellipse(x+55, 90, 50, 50);
  ellipse(x+65, 110, 50, 50);
  ellipse(x+20, 110, 80, 80);
}