Bolt of elements

You conjure four bolts of pure elemental energy. Each turn you must cast one of the bolts of take the damage. The first bolt is fire, the target takes 2d6 fire damage. The second is water taking 1d6 force damage. The third is made of wind the recipient takes 1d4 force and 1d6 cold damage. The final blast is constructed entirely of stone the target takes 1d8 bludgeoning