Controlling a robot turn using the EV3 Gyro sensor

This video shows how to control a robot turn using a Gyro sensor and explains why the robot often turns a little bit more than we expect.
The gyro sensor animation at about 13:00 in the video was created in Scratch. If you want to look at the Scratch project and experiment with it the link is
scratch.mit.ed...
The link to the follow-up video showing how to make gyro turn code more compact is
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