repeat {
  bounds: 0 0 100 100;
  child-bounds: 0 0 0 0;
  child: color {
    bounds: 0 0 20 20;
    color: rgb(255,0,0);
  }
}
repeat {
  bounds: 0 0 100 100;
  child-bounds: 0 0 20 0;
  child: color {
    bounds: 0 0 20 20;
    color: rgb(0,128,0);
  }
}
repeat {
  bounds: 0 0 100 100;
  child-bounds: 0 0 0 20;
  child: color {
    bounds: 0 0 20 20;
    color: rgb(0,0,255);
  }
}