#define g_ledpin 13
#define y_ledpin 12
#define r_ledpin 11

void setup() {
    pinMode(g_ledpin, OUTPUT);
    pinMode(y_ledpin, OUTPUT);
    pinMode(r_ledpin, OUTPUT);
}

void loop() {
    // Green LED on for 1 second
    digitalWrite(g_ledpin, HIGH);
    digitalWrite(y_ledpin, LOW);
    digitalWrite(r_ledpin, LOW);
    delay(1000);
    
    // Yellow LED on for 0.2 seconds
    digitalWrite(g_ledpin, LOW);
    digitalWrite(y_ledpin, HIGH);
    digitalWrite(r_ledpin, LOW);
    delay(200);
    
    // Red LED on for 1 second
    digitalWrite(g_ledpin, LOW);
    digitalWrite(y_ledpin, LOW);
    digitalWrite(r_ledpin, HIGH);
    delay(1000);
}