Arduino Traffic Light

//Arduino Traffic Light
/*This project was made with 10mm LEDs to better visualization by using 3 LEDs for showing separately its colors Red, Yellow & Green respectively. */

int redLed = 2;
int yellowLed = 7;
int greenLed = 12;

void setup() {
 pinMode(redLed, OUTPUT);
 pinMode(greenLed, OUTPUT);
 pinMode(yellowLed, OUTPUT);
}
void loop() {
 digitalWrite(redLed, HIGH);
 digitalWrite(greenLed, LOW);
 digitalWrite(yellowLed, LOW);
 delay(10000);
 digitalWrite(redLed, LOW);
 digitalWrite(greenLed, HIGH);
 digitalWrite(yellowLed, LOW);
 delay(5000);
 digitalWrite(redLed, LOW);
 digitalWrite(greenLed, LOW);
 digitalWrite(yellowLed, HIGH);
 delay(2000);
}