My subject was hands grabbing a fence. To make it I used marker. I drew out the hands and fence in pencil then traced over the lines in marker. When I looked at prompt and and saw pure contour I thought of doing a drawing of a chain link fence because they have cool lines and lend themselves well to pure contour.
Originally the hands didn't have arms but I added them and it looks like a more complete piece now.
Originally it was going to have the hands up over the fence but I thought it wood look cooler to have the fingers reaching through the fence. It evolved by changing the placement of the hands and changing the arms to have the zentangle on them not the top of the fence