Video: GIFs are fun, and if you're an artist, it's easy enough to turn your art into a short animation in Photoshop. This quick tutorial from Adobe shows you how it's done.
Adobe has a series of quick tutorials to teach you some basic Photoshop tricks. In this one, you basically create a series of your drawing as layers. Then, import those into a single Photoshop document. From there, navigate to Window > Timeline and select "Create Frame Animation". From there, you make frames out of your layers, set your animation loop to "forever", and export as a GIF.
It's a lot easier to see how it's done in video form, however, and this tutorial makes the whole process super simple. Check it out above, then head to the link below to watch all of their one-minute tutorials.