Every (enemy) token with random HP when placed on the map how?

Hello So rather than using the average HP for every enemy I would like roll20 always to roll the HP every time I place an enemy on the map, I'm not good with scripts so I don't know how to do this at all. If you could help that would be great. I was reading 7 year old forum post about this subject and used a script that someone posted there, but that didn't help or it didn't do what I hoped for. 

MonsterHitDice  will do just that. 

Hi Kristian! This actually requires a mod script, but since you are a Pro user, you are in luck. Check out MonsterHitDice, available from One Click installation on your game's Mod page. Configure the script's landing page and your monsters will come out random every time. Here's a good intro to installing scripts: How to Install Roll20 API Scripts

Thanks for quick reply :)