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lilmatt's blog January 14, 2010 Quick Hax: throbber/spinner with true alpha channel After showing this hack to a friend, he suggested I blog about it so others could both use it and optimize it. Today, I needed a throbber/spinner icon for a project. The standard way of doing this is with animated GIFs. They're widely supported, and have been around since like Netscape 1.1. The only rub is that transparent GIFs don't have true transparency. You just pick one colour to be "knocked out" when it's