Whats that song used for background music that goes dun dun dun, dun, dundundun, dundundun etc?

I've seen it in a video and it usually has a bunny in it, and the bunnies sneaking around or tiptoeing. I think its played on the flute. I'm not sure. But its used in the background to go in time with the bunnies footsteps. I think its in bugs bunnies or in other videos when used for sneaking around. I might be able to figure out the first few notes on piano but I'm not sure.