#define echoPin 9
#define trigPin 10
#define camTrigger 8

long duration;
int distance;
int count = 0;

void setup() {
  pinMode(camTrigger, OUTPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  digitalWrite(camTrigger, LOW);
  Serial.begin(9600);
}
void loop() {
  ReadSensor();
  if (distance < 20) {
    count++;
    delay(1000);// 1000 milli second = 1 second
    Serial.print("(+)");
    if (count == 5) {
      Serial.println("Take Photo");
      count = 0;
      digitalWrite(camTrigger, HIGH);
      delay(1000);
      digitalWrite(camTrigger, LOW);
      delay(1000);
    }
  }
  else {
    count = 0;
  }
}// end of LOOP

void ReadSensor() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2;
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
}