Stage: 2, 3 and 4 Challenge Level: 
Can you use LOGO to draw the Star-square?
You might wish to look at the first couple of articles in the"First Forward" series. if you have not met LOGO before.
You can download some excellent free LOGO software from the internet at http://fmslogo.sourceforge.net/.
Practical Activity. Recursion. Angle properties of shapes. Introducing algebra. Sequences. Squares. Investigations. Working systematically. Logo. Angles at a point/on a line.
Published July 1999.
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email: nrich@damtp.cam.ac.uk