A method of attaching a string of decorative lights to the outline of a house, by attaching a string of decorative lights to outline both a first side of the house in a first regular parallelogram array and a second adjacent side of the house in a second regular parallelogram array, wherein the first and second parallelograms slant in opposite directions. When lit, the resulting light display is slightly out of register with the outline of the house. This subtle asymmetry fools the passing eye into taking a second look.