Enter a 4 number string into the code input. Combinations: 6141 - Dutch flag 2903 - yellow to blue gradient stripes 5724 - rainbow 2468 - other rainbow Imprint bug: Sorry but an imprint of the last combination always shows on the first screen. I will try to fix this but for now just do this: · Click the green flag again to make the imprint go away. · Comment if you know why it's happening.