 		if actualPiece.zone.contains event.point
 			actualPiece.group.position = background.position
 
+			# Send behind all the other pieces
+			actualPiece.group.sendToBack()
+
 		# Reset
 		for piece in pieces
 			piece.group.strokeWidth = 0 

		dropZone.fillColor = 'white'
		dropZone.opacity = 0.5
		dropZone.position.x = i * rectangle.width + rectangle.width / 2

		# The edge will serve as the mask for the piece
		pieceEdge = new P.Shape.Rectangle rectangle

	Two pieces
	###

	dropZoneLayer = new P.Layer()
	piecesLayer = new P.Layer()
	pieces = []

	for i in [0..1]
