Piping Ruffles

This pretty buttercream edging on the cake was done with a Wilton 140 tip. As I piped, I just moved the piping bag from side to side just a little bit and it produced these lovely ruffles. Below is the tip.

The cake has a figure skating theme and I made a pair of skates in colourflow. This was the pattern I used. I'll post a picture when I'm finished.