 			points[i] = new Bu.Point @randomX(), @randomY()
 
 		triangle = new Bu.Triangle points[0], points[1], points[2]
-		triangle.points[0].label = "A"
-		triangle.points[1].label = "B"
-		triangle.points[2].label = "C"
+		triangle.points[0].label = 'A'
+		triangle.points[1].label = 'B'
+		triangle.points[2].label = 'C'
 		return triangle
 
 	generateRectangle: ->


		for i in [0..3]
			point = new Bu.Point @randomX(), @randomY()
			point.label = "P" + i
			points.push point

		return new Bu.Polygon points

	generateLine: ->
		line = new Bu.Line @randomX(),@randomY(),@randomX(),@randomY()
		line.points[0].label = "A"
		line.points[1].label = "B"
		return line

	generatePolyline: ->
		polyline = new Bu.Polyline
		for i in [0..3]
			polyline.addPoint new Bu.Point @randomX(), @randomY()
		return polyline


	generateCircle: ->
		circle = new Bu.Circle @randomX(), @randomY(), @randomRadius()
		circle.center.label = 'O'
		return circle

	generateBow: ->
