code: function (x, y, width, height) {
              var points = this._glPoints;
              points[0].x = x;
              points[0].y = y;
              points[1].x = x + width;
              points[1].y = y;
              points[2].x = x + width;
              points[2].y = y + height;
              points[3].x = x;
              points[3].y = y + height;
              this.compositor.drawLine(points, 4);
          }
docs: Draw a stroke rectangle at the specified coordinates
  @name strokeRect
  @memberOf me.WebGLRenderer.prototype
  @function
  @param {Number} x
  @param {Number} y
  @param {Number} width
  @param {Number} height