blend {
  bottom: container {
  }
  top: container {
  }
}
blend {
  mode: color-dodge;
  bottom: container {
  }
  top: container {
  }
}
blend {
  mode: difference;
  bottom: color {
    bounds: 0 0 50 50;
    color: rgb(255,0,204);
  }
  top: color {
    bounds: 0 0 50 50;
    color: rgb(255,0,204);
  }
}