The first one is an all white gear, the same used in "view source". The second has an outline, that may work better in general for any activity icon.
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The following needs to be done programmatically:
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* reduce activity icon by 71,43% (that reduction makes strokes of 3.5 pixels look as 2.5 pixels)
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* put activity icon on the top left corner, with a margin of 2 pixels
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* put gear badge on the bottom right corner, with a margin of 2 pixels
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:I think you can add a border without changing the shape of the gear itself as per the example below. --[[User:Walter|Walter]] 12:54, 12 August 2011 (EDT)