110 bpm, 4 parts, every part should perfectly loop. This is a remix of http://www. Freesound. Org/people/erokia/sounds/187495 and http://www. Freesound. Org/people/erokia/sounds/191085. Thank you erokia!.
Sounds like rain. Made from crumpling tin foil. Should loop seamlessly. Boosting some of the lower frequencies (around 80 - 100 hz) should add some thunder for you.