int red = 13;
int yellow = 12;
int green = 11;


void setup(){
pinMode(red, OUTPUT);
pinMode(yellow, OUTPUT);
pinMode(green, OUTPUT);
}


void loop(){
digitalWrite(green, LOW);
digitalWrite(yellow, HIGH);
delay(2000);

digitalWrite(yellow, LOW);
digitalWrite(red, HIGH);
delay(5000);

digitalWrite(yellow, LOW);
digitalWrite(red, LOW);
digitalWrite(green, HIGH);
delay(5000);}