All examples on the left are chosen so that rotating or flipping the grid in any way would result in a grid satisfying the same rule.
Adjacent-numbered pages: BP1254 BP1255 BP1256 BP1257 BP1258  *  BP1260 BP1261 BP1262 BP1263 BP1264
notso, rules, grid, miniworlds
grid_of_images_with_rule [smaller | same | bigger]
Aaron David Fairbanks