Not all MP3 files loop. Usually its automatic if you use the "sound- play music" trigger, but depending on how the mp3 was ripped/created, it may or may not loop. If it doesnt, just create a trigger with a periodic event that plays the music after so many minutes. (i.e. if its a 1:30 minute long song, have the periodic event trigger fire every 90 seconds.) -VGsatomi
Correct me if I'm wrong, but in my experience if you import the sound as "music" instead of "sound" it will loop automatically. To do this, select any preset music and an import music button will replace the import sound button. And for the trigger, play music instead of play sound.
