Here's a simple pattern made with a 3 pentagon 2 square spacers. Take away the spacers and you end up with a very dull triangular grid. Since there is so much white space the bright colours seem to work without being over powering.
This pattern is a bit of a revisit of X bug from Jan 2008. I like the chevrons and the gear like aspect. Does seem a bit spread out though. I'll play some more to see if there is something worth looking at.
