Do you want to see if a mob is angry at something? Or do you want to know when it is running away from blocks or a mob? This pack is for you! 

If a mob has an attackable target, then it will turn red.

If a mob is avoiding blocks or mobs like Piglins avoiding soul torches and Zoglins, it will turn blue. The mob may turn purple if it has an attack target AND it is avoiding blocks/mobs.

If a mob is in love (breeding), it will appear pink.  

Angry evoker and afraid fishermen villager

Piglin and wither skeleton angry

Same as previous image, but the piglin has a target AND is trying to avoid the zombie pigman

Chickens in love after being fed

Video