代码2_1_流水灯（未优化）
void setup() {
//设置数字接口2-11为输出状态
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
}
void loop() {
//让十盏灯逐个点亮
digitalWrite(2, HIGH);
delay(1000);
digitalWrite(3, HIGH);
delay(1000);
digitalWrite(4, HIGH);
delay(1000);
digitalWrite(5, HIGH);
delay(1000);
digitalWrite(6, HIGH);
delay(1000);
digitalWrite(7, HIGH);
delay(1000);
digitalWrite(8, HIGH);
delay(1000);
digitalWrite(9, HIGH);
delay(1000);
digitalWrite(10, HIGH);
delay(1000);
digitalWrite(11, HIGH);
delay(1000);
//让十盏灯逐个熄灭
digitalWrite(2, LOW);
delay(1000);
digitalWrite(3, LOW);
delay(1000);
digitalWrite(4, LOW);
delay(1000);
digitalWrite(5, LOW);
delay(1000);
digitalWrite(6, LOW);
delay(1000);
digitalWrite(7, LOW);
delay(1000);
digitalWrite(8, LOW);
delay(1000);
digitalWrite(9, LOW);
delay(1000);
digitalWrite(10, LOW);
delay(1000);
digitalWrite(11, LOW);
delay(1000);
}
