Simple confetti effect using CAShapeLayer and CoreAnimation on iphone?

I am building a fairly simple game on my app. the app UI is based a lot core animation so does the开发者_StackOverflow中文版 game. I am trying to achieve a simple confetti effect for the game using CAShapeLayer and core animation (in the style of the confetti in "cut the rope").

any help or direction will be appreciated.

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Well. for any one who looks. it is now available for iOS 5 with CAParticleLayer & CAEmitterLayer.