Everyone

A Venn diagram drawn with LED lights showing the 5 different
sets of social databases I once used: Hotmail.com contacts,
Facebook.com friends, Myspace.com friends, MSN messenger contacts
and those in my mobile phonebook - A total of 259 people.

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How?

1. List each person from the five sets & determine the (22) overlapping sub-sets

2. Design a five set Venn diagram, with each set & sub-set a different size

3. Reverse out copy & print onto A0 acetate & mount between two poles

4. Bounce light off back wall and photograph

5. Use separate black on acetate.
Stand behind & draw set boundaries with coloured LEDs

6. Place laser-cut shapes over sub-sets to prevent LEDs overlapping names

7. Some test samples.
NB: Drawing precise & complex shapes in complete darkness isn't easy!