Piebald or Pied is both a colour and pattern mutation. Pied is a white snake with patches of mutated pattern, in a different colour to the normal Wild Type. It is extremely variable, and can produce an almost all white snake down to a snake with no white on it at all.
You can even get Pied with smiley faces in the pattern, which are generally called Smiley Pied.
Pied is one of our favourite morphs and we are working with animals carrying this recessive gene, as well as in combination with albino.