Sit back and watch, or press space to make it follow you. (if it does circles at the start, try starting again.(Or make it follow you). If you want it to stop following you, just press E. Use 123456789 to change pen size to 10 20 30... Etc. Also, you can now adjust the size with Up arrow and down arrow. It's basically an interactive screensaver. Chain chomps are good.
