Please help ID insect or snake
I saw an insect that was maybe 4-6" long, strikingly banded (cross body) black and red, even band widths - very snake-like coloration, around the thickness of a pencil (maybe smaller?), solid body, hidden in leaves, trying to get back into hole (avoided contact, did not freeze or roll up). Did not see if it had legs (don't think so). Did not notice head or tail. If it was a millipede, it was very round-bodied, without noticeable flattening for legs. If it was a snake, it was very stubby.
Thank you for help identifying it.