© The LEGO Group

In the program NotNeeded, the motors will turn in one direction for 2 seconds, then reverse direction and continue turning in the opposite direction.

© The LEGO Group

In the program Needed, the motors will turn in one direction for 2 seconds, stop, and prepare to reverse direction. They won’t move in the opposite direction because the motors were turned off in the On For block. Therefore, for the motors to run, they must be turned on again.

 

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