fixing bug drumkit, alternative solution to ex 6

[vmmon-th0]

Hey !

This patch will fix the drumkit bug (when you press too many times, the css class gets stuck).
The second is an alternative to the exo 6.

I put the alternatives with a comment like this =>

"ALTERNATIVE =============================================>"

Cordialement, Ammon 😁

[palashmon]

Duplicate of #452

[vmmon-th0]

Duplicate of #452

Hello ! ✌🏽, what do you call duplicating, finding a solution to the same problem? because the code is absolutely not the same as #452

[palashmon]

Hi there, the duplicate label here is simply used to mark a pull request as a duplicate to track similar issues or pull requests together and remove the unnecessary burden for both maintainers and collaborators. I hope that makes sense. Thanks!

[vmmon-th0]

Okay, good to know !