The Guide To Being Cool

Did you folks every draw this weird S thing growing up? This was a huge part of middle school culture in the US (at least for me). Here's the three steps for drawing this. Oh and it's also a puzzle. Enjoy!
Ordinary Sudoku Rules Apply
Additionally, German Whisper rules apply: Adjacent digits along lines must differ by at least 5
That's it! Enjoy! :) You can play it here.