The mark consists of I drew a rectangular box with metal pins inside it going spherically down a tunnel on the inside of it. When a metal ball is put in the tunnel the metal ball strikes the pins making the metal pins make a ping like a music box with metal pins in it, making a tune or music. I drew the rectangle. Then I drew the lines going down making a tunnel. Then I drew lines going down the tunnel which are the metal pins. The whole process of drawing shapes and then giving them a mechanical purpose is called Mechanical Designs.