Screen Recorder

When the app starts, click on the Recorder button.

A punctured window will appear, line up to what you want to record and click on Record. When finished, click on the Stop button.

Remove unwanted frames by selecting them with Shift-Click and pressing Delete.

Add a transition to the last frame, so the animation loops more smoothly.

After your touch ups, click on Save As to export the animation to your format of choice.

Here's the result Gif, around 440 KiB.