I altered the given random walk algorithm into two versions.
First, I just simply gave colour variation depending on the point’s location on the canvas. (More specifically, the R and B values of RGB vary)
The code of this sketch is available here
Next, I made cat tracks in snowfield using this algorithm.
I had it to choose a random angle between -50° – 50° and made the footprint to move forward in that direction. However, I made it turn either -120° or 120° when it reaches the edge of the canvas.