anchor.diff:              }
               break;
             case VK_DOWN:
  +            print('down');
               if (direction.y != -1) {
                 direction.x = 0;
                 direction.y = 1;
  
positive.code:   final ptr = Pointer<Uint8>.fromAddress(bitmapMemory.address);
  
    var rowOffset = 0;
    for (var y = 0; y < bitmapHeight; ++y) {
      var pixelOffset = rowOffset;
      for (var x = 0; x < bitmapWidth; ++x) {
        if (data[vecY][vecX] == 1) {
          // Apple
          //blue
  
negative.code:       {
          switch (wParam) {
            case VK_LEFT:
              print('left');
              if (direction.x != 1) {
                direction.x = -1;
                direction.y = 0;
  