Wanna try this! The simplest edge-in mitred garter square, recolored and rotated: Mitered Crosses Blanket, knitting pattern to make with Noro yarn, from Mason-Dixon Knitting. Proceeds from pattern sales got to Japan relief.
Ruth Instructions how to knit mitred squares are in Vivian Hoxbro's lovely book "Knit to be Square". I used Noro Kureyon yarn in 10 colours, 2 balls of each, and experimented! The colour combinations in this yarn are wonderful!