int LEDred1 = 1;
int LEDyellow1 = 2;
int LEDgreen1 = 3;
int LEDred2 = 4;
int LEDyellow2 = 5;
int LEDgreen2 = 6;
int LEDred3 = 7;
int LEDyellow3 = 8;
int LEDgreen3 = 9;

void setup() {
pinMode(LEDred1, OUTPUT);
pinMode(LEDyellow1, OUTPUT);
pinMode(LEDgreen1, OUTPUT);
pinMode(LEDred2, OUTPUT);
pinMode(LEDyellow2, OUTPUT);
pinMode(LEDgreen2, OUTPUT);
pinMode(LEDred3, OUTPUT);
pinMode(LEDyellow3, OUTPUT);
pinMode(LEDgreen3, OUTPUT);
}

void loop(){

  digitalWrite(LEDred2, HIGH);
  digitalWrite(LEDgreen1, HIGH);
  digitalWrite(LEDred3, HIGH);
  digitalWrite(LEDyellow1, LOW);
  digitalWrite(LEDyellow3, LOW);
  digitalWrite(LEDred1, LOW);
  digitalWrite(LEDgreen3, LOW);
  delay(4000);

  digitalWrite(LEDyellow2, HIGH);
  digitalWrite(LEDyellow1, HIGH);
  digitalWrite(LEDred2, LOW);
  digitalWrite(LEDred3, HIGH);
  digitalWrite(LEDred1, LOW);
  digitalWrite(LEDgreen1, LOW);
  delay(1500);

  digitalWrite(LEDgreen2, HIGH);
  digitalWrite(LEDred3, HIGH);
  digitalWrite(LEDred2, LOW);
  digitalWrite(LEDred1, HIGH);
  digitalWrite(LEDyellow2, LOW);
  digitalWrite(LEDyellow1, LOW);
  delay(4000);

  digitalWrite(LEDyellow2, HIGH);
  digitalWrite(LEDyellow3, HIGH);
  digitalWrite(LEDred3, LOW);
  digitalWrite(LEDred2, LOW);
  digitalWrite(LEDred1, HIGH);
  digitalWrite(LEDgreen1, LOW);
  digitalWrite(LEDgreen2, LOW);
  delay(1500);

  digitalWrite(LEDyellow2, LOW);
  digitalWrite(LEDred3, LOW);
  digitalWrite(LEDred2, HIGH);
  digitalWrite(LEDred1, HIGH);
  digitalWrite(LEDyellow3, HIGH);
  digitalWrite(LEDyellow2, LOW);
  delay(1500);

  digitalWrite(LEDyellow3, LOW);
  digitalWrite(LEDred3, LOW);
  digitalWrite(LEDred2, HIGH);
  digitalWrite(LEDred1, HIGH);
  digitalWrite(LEDgreen3, HIGH);
  digitalWrite(LEDyellow3, LOW);
  delay(4000);

  digitalWrite(LEDred1, LOW);
  digitalWrite(LEDred2, HIGH);
  digitalWrite(LEDyellow1, HIGH);
  digitalWrite(LEDyellow3, LOW);
  digitalWrite(LEDgreen3, LOW);
  delay(1500);
}