void setup() {
  pinMode(2, OUTPUT); // South Red Light
  pinMode(3, OUTPUT); // South yellow Light
  pinMode(4, OUTPUT); // South Green Light

  pinMode(5, OUTPUT); // East Red Light
  pinMode(6, OUTPUT); // East yellow Light
  pinMode(7, OUTPUT); // East Green Light

  pinMode(8, OUTPUT); // North Red Light
  pinMode(9, OUTPUT); // North yellow Light
  pinMode(10, OUTPUT);// North Green Light

  pinMode(11, OUTPUT);// West Red Light
  pinMode(12, OUTPUT);// West yellow Light
  pinMode(13, OUTPUT);// West Green Light

}

void loop() {
 
 // Bike on South
 digitalWrite(13,0);      // west green signal off
 digitalWrite(5,1);    // East Red signal on
 digitalWrite(8,1);     //north red signal on
 digitalWrite(11,1);      //west red signal on
 digitalWrite(3,1);     //south yellow signal on
 delay(3000);
 digitalWrite(3,0);     //south yellow signal off
 digitalWrite(4,1);    // South Green signal on
 delay(7000);

// Bike on East
 digitalWrite(4,0);     //south green signal off
 digitalWrite(6,1);     // east yellow signal on
 digitalWrite(2,1);     // south red signal on
 digitalWrite(5,0);      //east red signal off
 delay(3000);
 digitalWrite(7,1);     // east green signal on
 digitalWrite(6,0);     // east yellow signal off
 delay(7000);

 // Bike on North
 digitalWrite(7,0);     //east green signal off
 digitalWrite(9,1);     // north yellow signal on
 digitalWrite(5,1);     // east red signal on
 digitalWrite(8,0);      //north red signal off
 delay(3000);
 digitalWrite(10,1);     // north green signal on
 digitalWrite(9,0);     // north yellow signal off
 delay(7000);

//Bike on West
 digitalWrite(10,0);     //north green signal off
 digitalWrite(12,1);     // west yellow signal on
 digitalWrite(8,1);     // north red signal on
 digitalWrite(11,0);      //west red signal off
 delay(3000);
 digitalWrite(13,1);     // west green signal on
 digitalWrite(12,0);     // west yellow signal off
 delay(7000);
}