/*Occupancy detector sensor controlled change . */
 
#define East  2    //connects to output pin of IR sensor East
#define West  3   //connects to output pin of IR sensor West
#define Control 13    /* connect to play on DF player If it goes high the bells start playing. */
int valcontrol = 0;
void setup() {
  Serial.begin(9600);
  pinMode(East, INPUT);
  pinMode(West, INPUT);
  pinMode(Control, OUTPUT);
 
}
void loop() {
 
  int valEast = digitalRead(East);
  int valWest = digitalRead(West);
  //if bells are not ringing and neither sensor is tripprd, meaning a train has not enter the crossing,
  //the bells do not ring.
  if (Control, LOW){
  if ((valWest == HIGH) || (valEast == HIGH))
  //if a train passes one of the sensors, the bells commence ringing. If it is longer than the distance between 
//  the sensors, the bells continue to ring.
  {
    digitalWrite(Control, HIGH);
  } else {
    digitalWrite(Control, LOW);
  }}
  //the bells are now ringing. a short train will be between the sensors but the bells should continue to ring.
 // even though no sensor detects the train. so:
 
 if (Control, HIGH)
 {
  if ((valWest == HIGH) || (valEast == HIGH))
  {
    digitalWrite(Control, HIGH);
  }
  else
  {
    if ((valWest == LOW) && (valEast == LOW))
    {
 
           digitalWrite(Control, LOW);
    }}

     } }