- The Computer sets up a code of coloured ball. Duplicates are allowed, so even all balls with the same colour might be possible. Your aim is to break the code in twelve or less guesses. Drag one of the coloured balls and drop it into the appropriate hole on the board, starting at the bottom row. Once a row is complete, click “Check Colours”, and the game will provide feedback. A black ball on the left indicates that one of your guess balls is correct both in colour and position, a white ball indicates that one of your guess balls is correct in colour but wrong in position. Good luck.