The shorter tines sound higher in pitch. This means that any ascending scale travels away from the player toward the back of the instrument. An ascending major scale is played by playing a "three-four" pattern: do-re-mi, fa-sol-la-ti, do-re-mi, etc., going higher and higher until you run out of notes. The visual/tactile sensation of playing a group of three notes followed by a group of four notes results from the nature of the major scale: two whole steps, followed by a half step, followed by three more whole steps, and ending with one more half step to get back to "do". The minor scale and the five other musical modes work much the same way, as does the major pentatonic scale and its "modes".