It will start the streams moving downwards. Pressing [S] will start/stop the streams. Pressing [R] while the stream is stopped it will reverse the direction

Flags

--help or -h: Print a help message for the program

--streamLen: Sets the length of the stream to the proceeding value

--tickTime: Sets the time in ms between redraws of the streams

Project Sources

These were used to learn how to use OpenGL:

https://learnopengl.com/

https://lazyfoo.net/tutorials/OpenGL/index.php

https://www.khronos.org/registry/OpenGL/index_gl.php