1、单灯左循环一次，然后单灯右循环，单灯依次向左亮，单灯依次向右亮，双灯同时向中间移动 2、数码管程序-1, a single light left of the circle, then right-circle single lamp, single lamp light turn left, turn right, a single lamp light, dual-lamp at the same time move to the middle of 2, the digital c