Silent thinker, housed in metal, counting in light and dark, orchestrating digital symphonies without a sound.

At first I was one and only one. Then I became two and grew grew. I further became three through and through. I moved to five and began to thrive. I jumped to eight and ate and ate. Unending I grew forever and never undue. What am I?

Geometric by design, a dozen sides to define.

Unlucky to ten Six may fear me Swimming swans find me prime.

You do everything right, but it all goes wrong. You veer right, but your car goes left. Add a lane to a road, traffic gets worse. When you fail, you learn more than success. If you slow down, things go faster.