https://zhuanlan.zhihu.com/p/55006176?utm_source=qq&ivk_sa=1024320u
https://blog.youkuaiyun.com/pjydpj/article/details/127621852
//#include<stdio.h>
define LED_BUILTIN13 13
define LED_BUILTIN12 12
define LED_BUILTIN11 11
define LED_BUILTIN10 10
//int c=1000;
int i;
void setup() {
// put your setup code here, to run once:
pinMode(LED_BUILTIN10,OUTPUT);
pinMode(LED_BUILTIN11,OUTPUT);
pinMode(LED_BUILTIN12,OUTPUT);
pinMode(LED_BUILTIN13,OUTPUT);
}
void loop(){
//10到13亮灯
for(int i=10; i<13; i++){
digitalWrite(i,HIGH);
del