What is the version of the following sentence with correct punctuation?

15 And the priest is to take it to the altar and after its head has been twisted off it is to be burned on the altar and its blood drained out on the side of the altar
15 And the priest is to take it to the altar, and after its head has been twisted off, it is to be burned on the altar, and its blood drained out on the side of the altar: