This is a completely functional binary clock model in Scratch. If you don't know how to read a binary clock, refer to here: http://www.wikihow.com/Read-a-Binary-Clock. Pressing the space bar switches between a light and a dark theme. It converts the hour, minute, and second of your system time into binary (while prepending extra zeroes when needed) and creates a list of the 1s and 0s. Each light corresponds to a certain place in the list and it turns on if its number in the list is a 1, and turns off if its is a 0. This all happens every single second.
You know, I WAS going to make this look nicer, but I'm too lazy to do that. I was using this as a reference as I was making my own binary clock, so I didn't bother making it pretty, and now that I'm done, the chances that anyone will stumble upon this project are so low that it's pretty unnecessary.