Click and drag to draw a path for the robot. Press space to begin. :::UPDATE::: "Random" button added.
I was bored, so I made this robot that uses color sensing to make it's way around line paths you make by drawing using the mouse. If it is not touching a line for a certain amount of time, it will turn itself towards the last angle it was at and find the track again. I know, this isn't perfect. That's why it's on my test account.