How to add Venetian Blinds effect to TMP text.

Hi I'm interested in a way of adding Venetian Blinds effect like you have in Adobe After Effects to my TMP text. I found standard unlit shader that mimics this effect but I don't really know how to apply it to TMP. Is there a way to modify TMP shader to add this effect or is there another way of doing this. And in general can we write custom shaders for TMP text and if yes can anybody point me in a right direction.