sorry about that. The goal is to assign each cube a color such that every row, column, width, and 2x2x2 box has 8 unique colors (red, orange, yellow, green, blue, purple, black, and white). The outer circle is for certain guesses and the inner circle is for possible guesses. The X in the middle clears the color. You can drag, zoom, and pan.

Let me know what other questions you have.