They're transparent GIFsso you don't need any HTML skills, just something you can make GIFs with. 
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Smallbrainfield,
Wed 1 Feb 2012, 13:39,
archived)
That's my flag!
Wobbly Bloke Hello, did I miss anything on,
Wed 1 Feb 2012, 13:44,
archived)
Whoops! Not sure why I've got a copy. I think I did an icon one, hang on...*strains* ahhh, here we go. 
( Smallbrainfield,
Wed 1 Feb 2012, 13:49,
archived)