A poem an a sketch have a lot in common. Both are made from lines - lines of flight and lines of convergence. Both only require a pencil and some paper.
Some lines have current that pass through them. These are called wires.
1. Find a wire, and try following it.
2. If you find the wire's end,
3. Sigh.
4. Go and find the other end.
5. If you find the other end,
6. It was not a very good wire.