How to create lightning effect using cocos2d

I am creating a rain scene in my game. I want to show the lightning effect. How to do it in cocos2d?

i used partical sysytem to s开发者_JS百科how the rain. how to do the lightning?

Thanks in advance

http://britneyleejohnson.com/?p=144 for rain

http://brenwill.com/cocos3d/ for Lightning