Some yards are pure geometry — a rectangle of grass, a straight walk, a West End brick street that has not shifted in a century. L Squared Aesthetics LLC works to that logic: mowing in true lines, trimming close along steps and stone, edging until the border between lawn and pavement is a drawn line rather than a suggestion. Decatur's older blocks reward that kind of attention, because the bones of the place are already square. Seasonal cleanups keep the picture clear at both ends of the year, spring and fall. Standing at the curb afterward and seeing every angle line up is the point of doing it this way.