This is a simple timer made in python but instead of playing a sound like most timers do this one will display a pop-up on the screen To use it open your terminal and run the these commands:

git clone https://github.com/fire9dragon/python-timer

cd python-timer

sudo apt install python3-tkinter

python3 timer.py

NOTE: the thired command only needs to be run on linux if you are on windows you can ignore the "sudo apt install pythn3-tkinter"