My implementation tomato timer on C Language. This implementation is made for terminals and for the program uses the library "ncurses.h". It works very simply, 25 minutes of work and 5 minutes of rest, and so on in a cycle.
sudo apt install cmake libncurses5-dev libncursesw5-dev
A ready-to-use assembly CMakeLists has already been written to start.
mkdir build && cd build
cmake ..
cmake --build .