Frieder Nake, Untitled, 1972, serigraph
Programs that look good. Some of them are calligrams. From the tEMPEL dES cODES by Nikon (aka Lord Nikon), 2013/14.
These graphics are actually text, which is actually code, which when executed shows an animated ASCII torus. By Lord Nikon/Dekadence, 2014. More code calligrams here. via
ASCII art that also includes a program. By Lord Nikon. Excepert from his collie Ascii Scene is Dead, 2014.
The skull is a program that you can run on OSX/BSD/etc. By Lord Nikon. Excerpt from this ASCII-collection.