I'm trying to make a block that lights up when you step on it and returns normal when you step off.

I can get it to light up but can't find a way to detect when the player steps off. Is there a way to check that, maybe with a tile entity?

I was doing something similar (except the block grows tentacles and attacks you instead of lighting up) and I just scheduled a tick half a second later each time I detected the player standing on the block. 

You can use either a ticking block entity or override tick in your block class. When the block ticks, check if there is a player on it and if there is, light it up, else de light it

Edited August 31, 20241 yr by Xoroshio