Need help to beat the voidray colossi build (Zerg)

Hello i'm a gold leauge zerg player. and i relly need help to beat the voidray colossi build.

i've tried almost everything it feels like but it ends up the same over and over again. i can't win over it. 

So it would be relly nice if someone could explain for me how to beat it. thx =) (srry for my english)