 		pieceBackground.onLoad = () ->
 			@size = new P.Size P.view.size.width, .7 * P.view.size.height
 
+		# Create a Group using the mask and the background
 		pieceGroup = new P.Group pieceEdge, pieceBackground, pieceEdge.clone()
 		pieceGroup.clipped = true
 		pieceGroup.position.x = i * rectangle.width / 2 + rectangle.width / 2

			edge: pieceEdge
			group: pieceGroup

	actualPiece = null
	dragging = false


	pieces = []

	for i in [0..1]
		
		# The edge will serve as the mask for the piece
		pieceEdge = new P.Shape.Rectangle rectangle
		pieceEdge.set
			selected: true

		pieceBackground = new P.Raster
