http://media.sonicsquirrel.net/restingbell/rb024/01-green_world.mp3
http://media.sonicsquirrel.net/restingbell/rb024/02-kaze.mp3
http://media.sonicsquirrel.net/restingbell/rb024/03-trip.mp3
http://media.sonicsquirrel.net/restingbell/rb024/04-the_night_of_a_quiet_forest.mp3