Question

تا چشم به هم بزنی تموم شده ؟

Answer 1

تو یه چشم به هم زدن : http://goo.gl/SmwvFH

توی چشم به هم زدنی : http://goo.gl/a0G2Im

It will be finished in a flash/ in a blink of an eye.

Answer 2

It's over in a blink of an eye

 It will be over in a blink of an eye