In my first digital design class, my physics professor (who I took 6 classes with and respect very much) took a look at my breadboard computer with no consisten

In my first digital design class, my physics professor (who I took 6 classes with and respect very much) took a look at my breadboard computer with no consistent color coding for groups of wires and overall bad layout. He said it was bad and that I should start over from scratch in front of the whole class.