Default custom lockscreen slider

So I've been trying to find an unlocker that is a circle that slides to unlock and reveals thew home screen as you slide it. Ive seebln this on a stock android before (and ive been unablebto find it since) My twist is that i intend it to be a portal from portal from portal 2 that drags open. I have a htc one max and i would appreciate any help. I can answer any questions.