I'm looking for time countdowns.

Hi, I am looking for time countdowns.
10 minutes, 5 minutes etc ...
preferably as a gif and with a transparent background. Does anyone happen to have something like this on their computer and would be willing to share it with me? Or know where I can download something like this?
I've been searching all day, tried countless programs, but I just can't get transparency, which is important ...

Thanks for your help!

Check out:
https://vimeo.com/churchcountdowns/download/492020418/ba05819bb4

many, many thanks! <3

many timer apps available for download on smartphones or tablets. These apps allow you to set a specific countdown time and will sound an alarm when the time is up.