int red1 = 10;
int yellow1 = 9;
int green1 = 8;

// Traffic light two
int red2 = 13;
int yellow2 = 12;
int green2 = 11;

void setup () {
// Traffic light one
pinMode (red1, OUTPUT);
pinMode (yellow1, OUTPUT);
pinMode (green1, OUTPUT);

// Traffic light two
pinMode (red2, OUTPUT);
pinMode (yellow2, OUTPUT);
pinMode (green2, OUTPUT);
}

void loop () {
  digitalWrite(red2, LOW);
  digitalWrite(red1, HIGH);
  digitalWrite(green1, LOW);
  digitalWrite(green2, HIGH);
  delay(7000);

  digitalWrite(green2, LOW);
  digitalWrite(yellow1, LOW);
  digitalWrite(yellow2, LOW);
  digitalWrite(red1, LOW);
  delay(3000);
  }