Priest tome script

Hi, i just wanted to ask if there's anyone that could create a script that does the space if my hp fell under 50% or something like that ?
Or if theres already script like that.

Thanks for help !

edit: just wanted to add that im using orape.

Pay nilly 913908398392048329 dollars and Msellers will deliver it to you, completely naked.

Would be much easier with RealmRelay.....