Help with local varibles

Hi, Im trying to make a wand for mc and im trying to make a particle shooot out of it but when i try and make the particles shoot out i need to use local varibles but i need to wait 13 server ticks for the animation on the wand to finish before it casts the spell i can use local varibles because i use the WAIT 13 TICKS ON SERVER SIDE BLOCK and it doesnt let me use local varibles is there a way around this/is it possible to make like a subsitute??