ASUS - ZenTalk

It's happen doesn't long ago but, weirdly. When I turn on the phone, it's still normal then slowly become greenish like this: Then if I turn off the phone for a while, then become normal again. Then re-open the phone, a few second later like this aga...

I already experience this too many times, At first when my Asus Zenfone 5 with Lollipop firmware, it's just keep stuck when im playing game, so i'm force a shut down, and keep happens and happens. Then it's become worse like after shut down can't be ...