Based on an xkcd Comic and an idea from @343max
The Clock images are taken from http://xkcd.com/1335/ and are used under the Creative Commons Attribution-NonCommercial 2.5 License. The image has been sliced to allow dynamic display of time. http://xkcd.com/license.html
Naturally it lends itself to an Apple Watch App, so here it is. I have created a Swift Framework, which could be used from Objtive-C code as well (I did so only for test purposes so far)
Note: Sometimes, you need to rebuild the Swift Framework seperately before the Objective-C App recognizes the correct headers.