程序实现如下模拟彩灯，开发板从左至右4个按键分别为S1-S4，从上至下8个灯为L1-L8，按下S1键8只LED小灯以1HZ频率闪烁，按下S2键8只灯奇偶交替点亮，间隔0.3S，按下S3键，L1-L4与L5-L8灯交替点亮，间隔0.2s，按下S4键熄灭所有灯。-Lantern simulation program to achieve the following development board left to right are four buttons S1-S4, top to bot