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This challenge involves drawing pictures on a screen or generating image files. For pure ASCII art contests, use [ascii-art] instead. If participants can choose between graphics and ASCII art, use both tags. For images as input, use [image-processing].

6 votes

Tile the plane with this modified circle

IDL 8.3, 201 193 183 bytes The image is output into an IDL graphics window; I took a screenshot, below. EDIT: thanks to @AlexA. and @Sp3000 for helping me shave some bytes p=!pi/99*[0:99] q=p[49:0:-1] …
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