Invisible to B

@The B::x
Wow! I'm very pleased. This is exactly what I would like. So I didn't try in vain. thanks

@mastersifu
Oh, thank you my friend for appreciating my level very highly.

You wrote everything absolutely right! This is exactly the way it should be. To prevent B from pushing the motor very far, you need to press on the grass under the motor. And vice versa, so that B does not get stuck on the optical unit, you need to press on the grass that is farther than the optical unit. You got it absolutely right

Very cool and interesting use of star pass
THANKS FOR SHARING