Animated Staircase LED flow

Hi, I compiled successfully the usermod Animated_Staircase and I can not figure out how to have the light to flow up/down using the Chase effect. I am using 2 AM312 PIR and a strip of LEDs. Any help is appreciated. Currently my LED effect is one direction on any of the 2 PIR triggered.

I figured it using without mod by just assigning buttons with presets and playlist. Case closed!.