code: function(renderer) {
                  if (this.currentTile) {
                      // draw our diamond shape
                      renderer.save();
                      renderer.setColor("#FF0000");
                      renderer.stroke(this.diamondShape);
  
                      renderer.setColor("#FFFFFF");
                      // draw the tile col/row in the middle
                      this.font.draw (
                          renderer,
                          "( " + this.currentTile.col + "/" + this.currentTile.row + " )",
                          this.diamondShape.pos.x,
                          (this.diamondShape.pos.y + (this.currentTile.height / 2) - 8)
                      );
                      renderer.restore();
                  }
              }
docs: draw function