So this is another quick and simple one. You can buy 'large' wall hanging clock hands and then paint the wall behind with whatever design you want.
Step 1: Black on Blue
To paint the large circle, I put a screw in the middle of where I wanted the circle to be, and then attached a piece of bamboo pole and attached a pencil to the other end (using a rubber band)
I painted these clocks on the walls of a school I was working in. It added decoration as well as helped the students to keep track of time during recess...