Moiré patterns are intriguing interference patterns. Create your own beautiful examples using LOGO!

How do you write a computer program that creates the illusion of stretching elastic bands between pegs of a Geoboard? The answer contains some surprising mathematics.

More Logo for beginners. Now learn more about the REPEAT command.

Create a symmetrical fabric design based on a flower motif - and realise it in Logo.

Learn about Pen Up and Pen Down in Logo

This is a complete Logo development system which runs in the Flash Player. It can therefore be used to introduce Logo problems over the web without the need to refer readers to external. . . .

A Short introduction to using Logo. This is the first in a twelve part series.

What happens when a procedure calls itself?

This part introduces the use of Logo for number work. Learn how to use Logo to generate sequences of numbers.

Can you puzzle out what sequences these Logo programs will give? Then write your own Logo programs to generate sequences.

This is the second in a twelve part introduction to Logo for beginners. In this part you learn to draw polygons.

Turn through bigger angles and draw stars with Logo.

Write a Logo program, putting in variables, and see the effect when you change the variables.

More Logo for beginners. Learn to calculate exterior angles and draw regular polygons using procedures and variables.

Learn to write procedures and build them into Logo programs. Learn to use variables.

How would you judge a competition to draw a freehand square?

Learn how to draw circles using Logo. Wait a minute! Are they really circles? If not what are they?

Can you set the logic gates so that the number of bulbs which are on is the same as the number of switches which are on?

A geometry lab crafted in a functional programming language. Ported to Flash from the original java at web.comlab.ox.ac.uk/geomlab