Quicksand Sinking Effect

Hi everyone!

I have been creating a 2D Platformer and have animations for quicksand but I am stuck on how to approach setting up the sinking effect. Does this get applied to the Collider? How would I write the code?

Thanks!

 

What animations are they for the quicksand itself or for the character?

 

There are two animations, the first is the quicksand itself moving from left to right (2D game) and the second is the character waving his hands in the air as he sinks. I created a box collider 2D and had it sit on the top of the quicksand animation so that when the character touches it, he starts to fall. Then I created this long collider and named it deathFall so that when the quicksand collider touches it, it plays the reset script that I created to reset the level. I just put the character behind the quicksand to make it look like hes sinking. Is there a more efficient method? Thanks!