code: function( x, y, width, height, styles ){
  
              var graphics = new PIXI.Graphics();
              this.setStyles( graphics, styles );
              graphics.drawRect( x, y, width, height );
              graphics.endFill();
              return graphics;
          }
docs: PixiRenderer#createRect( x, y, r, styles ) -> PIXI.Graphics
  - x (Number): The x coord
  - y (Number): The y coord
  - width (Number): The rectangle width
  - height (Number): The rectangle height
  - styles (Object): The styles configuration
  + (PIXI.Graphics): A graphic object representing a circle.
  
  Create a rectangle for use in PIXI stage