I got the idea for this thingy when I was doing the JavaScript 30 tutorial, by Wes Bos, that shows you how to make a 'JavaScript Drum Kit'. I noticed there was a lack of a sound for a cowbell. Then I got a fever and, for some reason, I knew the remedy for this fever was ever increasing amounts of cowbell. So I took what I learn learned from the above tutorial (which you can find here) and created something to give me the necessary amount of cowbell I needed.
I'm hoping to make it more responsive by adding features that would allow one to play with the cowbells using a touch screen and not just a keyboard (which you're restricted to now). Also, making a background that looks good at any size would be nice as well.
Updated 5/25/19:
Needless to say I've finally gotten around to completing the above. I've made it so that when one is on a mobile device, one will see a bar that says 'Click'. Obviously, pressing 'Click' will display the 'cowbells'. Needless to say, this was inspired by that whole responsive navigation and, for some reason or another, I thought it would be appropriate here.