rune healing /per sec

[IMac]

is it possible to make a rune(ih) that heals you 20hp every 3 secs for 3 mins and after the 3mins you can use it again so it heals to 20hp every 3 secs for 3 mins and also cant be used if your above lvl 15?

 

[RealSoft]

addconddition..

most servers have this

addDamageCondition(fire, 10, 3000, -10), -10 = take 10 hp from the player
if you do this
addDamageCondition(fire, 10, 3000, 10) = give player 10 hp.
3000 = 3 seconds, change to anything you want.
the first "10" is how many times.

edit:
if it wont work with changing "-10" to "10", then try use "+10"