Light Puzzle - Specifications

Materials :
- LEDs (colors can be varied);
- resistors (1 kOhm);
- stripes of conductive tape;
- a 3-Volt battery;
- wire;
- paper/cardboards.

Set-up :
Each plate of this 3 x 3 grid consists of 4 stripes of conductive tape, 4 on top of the plate and 4
at the back of the plate. If the front stripes were to be positive (electric current) stripes, the
back stripes would be the negative stripes and vice versa. A positive stripe has to meet another
positive stripe and a negative stripe has to meet another negative stripe in order to have the whole
thing works.