A practice project based on the Tweeting Babbage project by the Raspberry Pi Foundation at https://github.com/raspberrypilearning/tweeting-babbage
A Raspberry Pi is set up with camera board, and a push button and three LEDs connected to a breadboard. When the button is pressed, the LEDs flash to form a countdown. When the countdown is complete, a photo is taken and posted to Twitter via Python.