Wavepool - Rare 'One' Easter Egg (1 in 25,000)
Here is a description of the project by artplusbrad, including details of Easter Eggs:
From the article linked above:
"The One Egg (1 in 25,000) is the rarest single egg I've programmed so far. Normally waves are made up of 5 to 99 individual sine waves, but this egg generates only a single sine wave. Each One wave still derives its amplitude and frequency from the block hash and can be modified like any other wave. While finding a One wave is hard enough, finding one combined with any other egg will be incredibly rare."