Click flag to see lizard tiling. (is most pretty to see and hear when not in turbo mode, since turbo is too fast) Click a lizard for waves of color change, and musical note playing. The lizard shapes are like M.C.Escher's reptile tessellations. Each lizard also represents a musical note.
The program fits the lizards together like a jigsaw puzzle. Look for symmetry in the pattern. Within each row is the same lizard pattern translated across the row ("translational symmetry"). But there are three different types of rows, each with the lizard turned 120 degrees (rotational symmetry). Underlying the lizard pattern is a honeycomb hexagonal pattern. For fun, when you click on a lizard, a wave spreads from that lizard in an expanding circle, which you see as color change. Each lizard also plays a musical note. You hear the notes as the waves spreads. (The central lizard plays the lowest note and more distant ones play higher and higher notes. It sounds a bit like what happens if you glide your finger over the entire piano keyboard, except this keyboard is in 2 dimensions instead of 1 dimension. I used four different instruments, one for each quarter of the screen).
