Autocast ability HELP ME!

[Swerd]

Ok so im trying to make an abilitiy that has auto cast wich is similar to cold arrows but has damage over time a.k.a bleeding.I was wondering how to go about that because there isno option for damage over time and all so can somone please tell me how to do it? please .

 

[Swerd]

o woops i thought my other thread didnt go through i didnt see it till now somone delete this please.