This shows both the original sequence (bottom) and the new sequence with the turnaround.
I hope this shows up well enough — it’s dark here now so the lighting may not be the best. If you’d like a clearer pic just leave a comment and I’ll try again in the daylight tomorrow.
In the picture I have completed 2 sequences of the second pattern.
As I write the big floor sander is wending its way across our bedroom floor……