Puzzling pencil line animation using SketchUp 2025 and Keyframe Animation 2.2.1

Описание: See if you can figure out how this animation was done. Used Sketchup 2025 to model then used Keyframe Animation 2.2.1 to animate. Seems rather simple BUT IT's NOT. see if you can recreate this.
If you figure it out, consider yourself a Sketchup and animation PRO and leave a comment.
BTW, if you were wondering if Keyframe Animation 2.2.1 plug-in from Regular Polygon works in SketchUp 2025, the answer is YES IT DOES if you pay the license fee.