Here are some spiral images made with Pan. These images are © Conal Elliott, 2000. 
 

spiral limit pattern c.jpg (181248 bytes) spiral limit pattern b.jpg (125428 bytes) spiral limit pattern a.jpg (159179 bytes) spiral limit pattern d.jpg (173193 bytes)

Also, here's a background (1280x1024 pixels): spiral limit pattern b background 1280.jpg (253247 bytes)

 

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