This is a model of diffusion where the colors get darker as they go away from the multi-color spiral (It), which moves around randomly. The colors represent values: the tiles closer to the spiral have higher values and the values go down as you get further away from the spiral. To see a whole different set of colors, press the space bar! The first set of colors is linear, counting values by tens. The second set is also linear, and counts values by 25s. The third set is non-linear, and counts values by doubling from 2. Enjoy! EXTRA CHALLENGE: FInd the white version of the tile...it is under something else...