Pipes
An example with heavy use of the Pen.
Run it here
The pens wander over a chalk board and split into new pens as they go. Click the stage, then press space for a new colour and H to show or hide the pens. The browser only plays the music after that first click.
To run it on your own computer, put
pen.png in a folder sprites,
chalk_board.jpg in a folder
backdrops and
bensound-enigmatic.ogg in a
folder sounds next to the program.
