Make a GIF Animation:
Create a new image or open an existing image to use as the first frame of the image.
Select the Image > Add Frame menu item. Draw the second frame of your image in this frame.
Repeat this process for as many frames as you want to be in the animation.
Select the View > Show Factories Info menu item and click the plus button in the inspector to add a new factory.
Select Graphics Interchange Format (GIF) from the format menu for the factory. In the animate menu for the factory, select whichever option you would like for how many times the animation should repeat.
Edit the frames until you are happy with them. Then click the Build button for the factory to build the GIF animation.