Making GPS Art while walking

There are numerous walking/running apps that record your routes. Many offer free versions. Along with the mapping apps came a new trend on making GPS art from walks.
Have you ever looked at your route after a walk and thought there was a design or a picture of something that you  created on your walk? 
Now you can learn about GPS art and create walks that draw shapes.

The two articles are about runners who do GPS art. Swap walking for running and you're all set to do your own walking art walks.
The one article talks about the network of city streets as a palette for creating art. I think it is more like an Etch-a-Sketch since you can 'erase' your walk and do another design using the same streets.
How to Make GPS Art 
​Making Art on the Run? includes a video