Play Period

Try to guess the three simple sine waves that are adding together to the mess you see on the screen. Once you've guessed all three correctly you'll have flattened that mess into a single solid line.

As you increase the difficulty the period values become more fine grained (between 1 and 9 at the easiest to between 1.0 and 9.9 (in increments of 0.1) at the hardest.