Place copies of the tiles on the board in such a way that the colours on neighbouring tile edges match. Tiles violating this rule are marked in red.
Inspired by a puzzle by Peter van Emde Boas.
The applet does nothing special when you finish the puzzle. However, the solution does show a very curious pattern. Can you figure out what it means? Hint: there is a relation between the colours at the top border and the colours at the bottom of the last row.