My animation has a transparent background, and when it plays, the previous frames show through. How do I make the previous frames go away?
The GIF animation format has several removal methods that can be used to control what happens to the current frame before the next one is drawn. The default method is “Leave Alone”: the current frame is left as is, and the next frame is drawn on top of it. This works great when the frames are designed to cover each other. But for animations with a transparent background, this doesn’t work as well: you end up seeing “through” the new frame to the old one. This is where the “Background Color” removal method comes in: the current frame is erased so that the original background (the web page’s background) is restored before the next frame is drawn.
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