newImage("drawing","RGB black",512,50,241);
for(slice=0; slice<=240; slice++){
  setSlice(slice+1);
  setColor(255,255,255);
  drawLine(25,10,225,10);
  drawLine(225,10,225,40);
  drawLine(225,40,505,40);
  setColor(0,255,0);
  if(slice<100){
    fillOval(20+slice*2,5,11,11);
  }else if(slice>100){
    fillOval(20+slice*2,35,11,11);
  }else if(slice==100){
    fillOval(20+slice*2,20,11,11);
  }
}