Thanks, Robobob! This is a great tutorial. We should have something just like this image on the fan site.
For a room that teaches the backswipe, I'd not underestimate the power of a floor pattern that shows the player where to move. It doesn't have to be optimal, just clear. For instance, showing a path with a distinct floor pattern on these highlighted squares, but nowhere else in the room for clarity:
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Gandalf? Yes... That's what they used to call me.
Gandalf the Grey. That was my name.
I am Gandalf the White.
And I come back to you now at the turn of the tide.