Requested WoW macro

I am requesting this macro on behalf of elemental shamans, if it has already been produced and posted, accept my sincere apology.

Can someone create a simple macro with 3 spells with cast priority in the following order:

Elemental Blast
Lava Burst
Lightning Bolt

Essentially I would press 1 button. If ele blast was available, it would cast first. If Lava Burst was up afterward it would cast that, then lightning bolt when the others are on cd. I would assume then that during ascendance that lightning bolt would be skipped due to spammable lava burst.

Can anyone help?