const int greenpin = 10;
const int yellowpin = 5;
const int redpin = 0;

void setup() {
 pinMode(greenpin, OUTPUT);
 pinMode(yellowpin, OUTPUT);
 pinMode(redpin, OUTPUT);
}

void loop() {
  
 
digitalWrite(redpin, HIGH);
delay(8000);
digitalWrite(redpin, LOW);
digitalWrite(yellowpin, HIGH);
delay(2000);
digitalWrite(yellowpin, LOW);

digitalWrite(greenpin, HIGH);
delay(7000);
digitalWrite(greenpin, LOW);


}