Just a little light bulb simulator. Click the button and the bulb will turn on. Click the button again and the bulb will turn of.
Light bulb image is from http://pixabay.com/en/bulb-light-electric-energy-power-307687/ (License: CC0 - Public domain) If you've found a bug or have an idea, please post it as a comment. I was inspired by @goldentiger174: http://scratch.mit.edu/projects/41563332/. Thank you for the idea!