In tonight's Pi.lab we had a graphical interlude - instead of writing Python programs to control the PiFace, we did some graphics programming using Python's Turtle module.
Turtle Graphics have their origins in Logo, and educational programming language developed by Seymour Papert at MIT in the 1970's. The language was originally designed to control a small robot which looked like a turtle moving across the floor. The turtle held a small pen which it could lift up and down so as it moved the Turtle could draw on paper.
Nowadays actual robot turtles are rarely seen, and have largely been replaced by 'screen' turtles which draw their graphics onscreen rather on paper. This is the approach the Python Turtle module takes.
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