SVG Flipbook runs next to your SVG editor and lets you animate your creation. Each layer in your SVG becomes one frame. You can use whatever SVG editor you like. Inkscape and Illustrator both work great. While you are editing the SVG, open the same file in the SVG Flipbook app. When you hit save in your SVG editor it will "live reload" in the app and you will see your changes playing. You can customize frame timing and behaviour by editing your layer names:

Set the frame duration by entering the number of milliseconds in brackets on the layer name, like (100) for a pause of 100ms, or 1/10th of a second.

Set a layer as a static background which will alwasy be visible, by adding the word (static) to the layer name.