Blinking LED

void setup() {
  pinMode (5, OUTPUT);
  pinMode (2, OUTPUT);
  pinMode (4, OUTPUT);
}

void loop() {
  digitalWrite (5, LOW);
  digitalWrite (2, LOW);
  digitalWrite (4, LOW);
  delay(200);
  digitalWrite (5, HIGH);
  digitalWrite (2, HIGH);
  digitalWrite (4, HIGH);
  delay(200);
}