Crazy diamond is also called "with a shadow diamond misperception", in fact, the color of each tile is the same, only because each rhombus up and down the two corners of the 30 ~ 40 degrees between the use of a little bit of tile on the wave of light method, the human eye will be the adjacent rhombus boundary line part of the intensity of the visual focus as a one by one, due to only focusing on one part, but visually mapped out the whole thing, the top rhombus and the bottom rhombus, it seems to become other things. A part of the visual but mapped out the whole thing, above the rhombus and below the rhombus, it is as if it becomes another color. In short, it is a subconscious miscalculation by the brain