Paint mini canvases, put together in square, use squeeze bottle to swirl white paint over all of them. (middle three diagonal = same color; two top diagonal=same color; two bottom diagonal=same color; top corner on color, bottom corner one color)
homemade: DIY Chevron Wall Art via Spunky Junky Tip: She uses shoebox lids instead of canvases! Earlier readers may know that I LOVE chevron. So this will almost definitely make it on the list of wall art projects that I must do for my dorm room.