.2, duration: 1 }, "<");
            t2.to(".square-19", { x: 155, y: -35, scale: 1.2, duration: 1 }, "<");
            t2.to(".square-20", { x: 140, y: 100, scale: 1.2, duration: 1 }, "<");

            // step3 
            // 左侧
            // t2.to(".square-0", { x: -160, y: -165, scale: 1.6, duration: 1 });
            // t2.to(".square-1", { x: -100, y: -180, scale: 1.6, duration: 1 }, "<");
            // t2.to(".square-2", { x: -155, y: -170, scale: 1.6, duration: 1 }, "<");
           