These 11k GIF's look good stretched, tiled, or centered in a black background.
For the technologically challenged: to make an image your computer's
background, right-click the image and left-click 'Set as Background'.
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If you have an idea for one, send me the quote, or to make it yourself,
just use the first as a frame, use ONLY the grey and black, save it as a GIF,
and e-mail it to me. If I like it, I'll add it to a later series.
Or if you want to make a background that looks nothing like these with color or 3D, go for it.
Remember any images/ideas you send become the property of humans.com!