Sunday, help artist Nora Rabins give the windmill at Prescott Farm a new look. The public is invited to help dye, print and sew new windmill sails at monthly studio work sessions. The sails will feature a large-sale design, derived from a pattern on grinding-stones inside the mill that will be visible from afar. Up close, hand printed graphics will serve as motifs of personal, local and historical relevance. The completed sails will be hoisted onto the mill in May.