Raspberry Pi Push Button LED Blink Program
References
https://www.engineersgarage.com/articles-raspberry-pi-python-push-button-interface-digital-input/
https://microdigisoft.com/interfacing-a-push-button-to-raspberry-pi/
https://www.electroniclinic.com/raspberry-pi-3-ldr-sensor-circuit-and-python-programming/
https://roboindia.com/tutorials/raspberry-digital-input-push-button/