B. For an animated GIF, again, download an editing program.
You can create multiple layers, by selecting: Layer -> New Layer. Each of these layers will be a slide for the animation. Tinker with them until you've got them all how you want then when you "Save As" type in .gif at the end of your image's name.
You'll be prompted with another window, where you'll select "Save as Animation". This is crucial otherwise your image will be the accumulative of all your layers combined into one. In the next window select the speed you want the images to shift and if you want them to loop, and wala!