int Contrast = 100;
int in = 12; // ir sensor 1
int out = 11;// ir sensor 2
int led = 10;
int count=0;
void setup()
{ 
 pinMode(in, INPUT);
 pinMode(out, INPUT);
 pinMode(led, OUTPUT);
 Serial.println("Visitor Counter");
 Serial.print("Person In Room:");
 Serial.begin(9600);
}
void loop()
{ 
 if(digitalRead(in))
{
 count++;
 Serial.println("Person In Room:");
 Serial.print(count);
 delay(1000);
 }
 if(digitalRead(out))
 {
 count--;
 Serial.println("Person In Room:");
 Serial.print(count);
 delay(1000);
 }
 if(count<=0)
 {
 digitalWrite(led, LOW);
 Serial.println("Nobody In Room");
 Serial.println("Light Is Off");
 delay(200);
 }
else if(count>6)
 {
 digitalWrite(led, HIGH);
 }
 else
 {
 digitalWrite(led, LOW);
 }
}