交通號誌-紅綠燈

int Rled=8; //紅色LED

int Yled=9; //黃色LED

int Gled=10; //綠色LED

void setup() {

// put your setup code here, to run once:

pinMode(Rled,OUTPUT);

pinMode(Yled,OUTPUT);

pinMode(Gled,OUTPUT);

}

void loop() {

// put your main code here, to run repeatedly:

digitalWrite(Rled,HIGH);

digitalWrite(Yled,LOW);

digitalWrite(Gled,LOW);

delay(5000);

digitalWrite(Rled,LOW);

digitalWrite(Yled,HIGH);

digitalWrite(Gled,LOW);

delay(2000);

digitalWrite(Rled,LOW);

digitalWrite(Yled,LOW);

digitalWrite(Gled,HIGH);

delay(5000);

digitalWrite(Rled,LOW);

digitalWrite(Yled,HIGH);

digitalWrite(Gled,LOW);

delay(2000);

}