quick macro help

i tend to not use potions even though i have em so i want some help making a macro so ill end up using them more.
basically i want "use potion of wild magic with regular click" and "use potion of speed with shift click" followed by /cast spell

#showtooltip SPELLNAMEHERE
/use [nomod] Potion of Speed
/use [mod:shift] Potion of Speed
/cast [mod:shift] SPELLNAMEHERE

This macro will use potion of speed and do nothing else. If you hold shift and use this macro, it will use a potion of speed and cast the spell you added in.

ty