When mid-day sales are slumping, blame it on the sunny weather. Or, why not harness the power of the sun during that lull to drive sales. Emart did just that. They created a piece of art that uses the angle of the sun, much like a sundial, to generate QR codes. Scanned QR codes directed people to their online store where they could purchase time sensitive “Sunny Sale” deals available only around noon when the shadows align to make to code active. Impressive!