The US Postal Service has unveiled a postage stamp commemorating the festival of Diwali among others which will be released later this year. The Diwali stamp features an intricate rangoli pattern created by Sangita Bhutada, a Houston-based artist and photographed by Binay Dixit. The USPS described rangoli as a vibrant floor pattern traditionally made from materials such as coloured rice powder, chalk and flower petals and believed to bring good luck.