Just press that there green flag and use the arrow keys. Right arrow key to see with color. Left arrow key to see without color. Or the other way around. I can't remember.
Took me HOURS!!!! I used the line tool in scratch. Incredibly difficult but totally worth the pain. If anyone wants to use him (his name is Velox Outlender) you can just give credit. I'ma be off of scratch for a week, (actually gonna be off my computer for a week) so I took a break from my current project to make this. Looks good, no? My current project is an animation. I'm making another one of these but with his girlfriend instead. The third one will be an animation featuring both of them :) Ciao.