A well known sound to many indie game-makers, the #pico8 boot-up melody is a quick triplet that uses the tones C, G, and F. This is known as an incomplete G7sus4 chord. It is made up of 2 perfect fourth intervals. Generally speaking, music usually wants to resolve up a fourth. Compare to the classic Game Boy boot sound, which is an octave of C's sounded in a flam.