Rectangular Tiling

I was inspired by this #mathart: http://mathhombre.tumblr.com/post/48437097612/love-these-planar-patterns-inspirational It's by Daniele De Nigris, who has a lot of geometric art: http://www.flickr.com/photos/denigrisdaniele/sets/ It got me thinking about showing tessellations by a wallpaper group type approach. Instead of modifying the edges, modify a pattern in the tile, and then the motions will be shown by the way the patterns connect. Technical info on the wallpaper groups: http://en.wikipedia.org/wiki/Wallpaper_group In this tiling I was experimenting with tangent circles for the lines.