Installation of artists Christo and Jeanne-Claude’s 7,500 gates in New York’s Central Park will begin next week. “The Gates,” as they are called, will be festooned with saffron-colored fabric panels and will line 23 miles of pedestrian paths from Feb. 12 to 27. They are being made in Queens and are nearly finished. The artists say they have been working on the project for 20 years.”