Okay, please excuse the pictures. Shane isnt home to help..
FYI I am using a minor torch, 3/32" mandrel, propane and a 5lpm concentrator
Bullseye Pumpkin orange and stringer pulled by me.
So first you have your vine stringer ready

Then you make a spacer shaped bead out of the orange

This is what I use to make the creases

I take my razor and starting at one side make a crease from the mandrel to the middle of the bead. Then I go from the other end and complete the crease

I continue this all around the bead. I dont worry about how many there are or if they are all even.. Looks more natural like this

next I apply my vine stringer to look "vineish"
and waa laa a pumpkin!