This is a great challenge: The music repeats 4 times (find it on the first sprite). The four penguins do the same thing, but: - penguin 2-4 hide, wait for some time and then show, - every penguin repeats the same set of sing&dance moves one time fewer than the previous one. 1) Click 'See inside' 2) Reorder the code on the first sprite. 3) Copy it onto the other sprites. 4) Add and change the appropiate code sequences.