Macro help

I need a macro button i can spam that does this

Fires cone of cold
fires cold snap
fires cone of cold
fires blastwave

Most of it is easy i just need to fire the cold snap after the first cone of cold and I dont know how to write that. thanks

#showtooltip
/castsequence Cone of Cold, Cold Snap, Cone of Cold, Blastwave

Is the bare minimum. Generally not advised to try to use a castsequence macro, but that would work.

Read here for additional information on putting some extra conditionals: https ://wow.gamepedia.com/MACRO_castsequence

thanks much

in so i can follow up and check that site