Depends on what effect you wanna go for. This one can be done with SetPlayerAttachedObject:
https://youtu.be/SSvLRHKIdzk?t=66
But if you want to go with the more red dot on the head type of effect instead you need ColAndreas:
https://youtu.be/aSabQWqQBkI?t=38
https://youtu.be/SSvLRHKIdzk?t=66
But if you want to go with the more red dot on the head type of effect instead you need ColAndreas:
https://youtu.be/aSabQWqQBkI?t=38