Arduino LED Traffic Light

const int green = 10; // Pin of the green LED
const int yellow = 8; // Pin of the yellow LED
const int red = 6;    // Pin of the red LED

void setup() {
  pinMode(green, OUTPUT);
  pinMode(yellow, OUTPUT);
  pinMode(red, OUTPUT);
}
void loop() {
  digitalWrite(green, HIGH);
  delay(4000);
  digitalWrite(yellow, HIGH);
  delay(1500);
  digitalWrite(green, LOW);
  digitalWrite(yellow, LOW);
  digitalWrite(red, HIGH);
  delay(5000);
  digitalWrite(red, LOW);
}