For the past decade, the Green twins have been a fixture in the Lower Haight and Fillmore neighborhoods. Every morning they walk side by side to get their coffee, wearing their trademark wide-brim hats, colorful plaid shirts and thick eyeliner. They wave to their neighbors and greet store owners until someone runs down the block to give them a big hug. Before you know it, they’re planning their next big art project. That’s what they do. They’re movers and shakers.