Jolly 1 is an upbeat song that plays in SimAnt when you have successfully eliminated the red ants from the yard in the full game. Although the title uses the same notation as the "sad" and "ant theme" songs, it is not played randomly during good news. It was composed either by Matthew Berardo, Steve Hales, Jack Thorton, or Chris Schardt.
The title comes from the song's file name and the meta data in it.
This is the original version of the song.
The song is index 21 in the SOUND.DAT file and "Jolly1" is the title in the MIDI meta data.
The Windows version of the song plays slightly faster than the original DOS version.
The song's file name is JOLLY1.MID, and "Jolly1.mid" is its title in the MIDI meta data.