#define R1 7
#define Y1 6
#define G1 5

void setup() {
  // put your setup code here, to run once:
  // pinMode(5, OUTPUT);
  // pinMode(6, OUTPUT);
  // pinMode(7, OUTPUT);
  for (int i = 5; i < 8; i++) {
    pinMode(i, OUTPUT);
  }
}

void loop() {
  int i;
  // put your main code here, to run repeatedly:
  digitalWrite(5, HIGH);
  delay(2000);
  digitalWrite(5, LOW);

  for (i = 0; i < 3; i++) {
    digitalWrite(5, HIGH);
    delay(500);
    digitalWrite(5, LOW);
    if (i < 2)
      delay(500);
  }
  digitalWrite(6, HIGH);
  delay(1000);
  digitalWrite(6, LOW);
  digitalWrite(7, HIGH);
  delay(3500);
  digitalWrite(7, LOW);
}

void ledon(int n) {
  digitalWrite(n, HIGH);
}

void ledoff(int n) {
  digitalWrite(n, LOW);
}