I have also placed these examples in your Czech dictionary in SignPuddle...

Both arrows are traveling straight up, parallel to the Front Wall.

While the movement travels up, at the same time, two rotations occur in the arm, while it travels up.

1. Example Number 1: The arm is parallel to the floor doing the rotation while the entire arm travels up.

2. Example Number 2: The arm is parallel to the front wall, doing the rotation forward and around while traveling up...