Changed sway

See Trello:

- https://trello.com/c/ZNBwNpn5/71-website-sway-value-of-50-in-the-setled-gave-very-smooth-results-in-the-potentiometer-tutorial-10-was-a-bit-jerky
Merge pull request #7 from somewhatabstract/patch-4

Changed sway