Introduction - If you have any usage issues, please Google them yourself
1LED lights from high to low, in order to 20000us time flow once, and then complete second points;
2LED lights from low to high, in order to 25000us time flow two times, and then complete third points;
3LED lights are four high and four low, alternately flashing three times at 50000us, and then fourth;
Repeat execution of 1~3 points.