blend {
  top: color {
    bounds: 0 0 50 50;
    color: red;
  }
  bottom: color {
    bounds: 25 25 0 10;
    color: blue;
  }
  mode: multiply;
}


blend {
  top: color {
    bounds: 25 85 0 10;
    color: blue;
  }
  bottom: color {
    bounds: 0 60 50 50;
    color: red;
  }

  mode: multiply;
}