taking pictures with laser trigger

gistfile1.ino

const int analogInPin = A0;  // Analog input pin that the potentiometer is attached to

int sensorValue = 0;        // value read from the pot


void setup() {
  // initialize serial communications at 9600 bps:
  //Serial.begin(9600);
    pinMode(9,OUTPUT);
}


void loop() {
  digitalWrite(9,HIGH);
  sensorValue = analogRead(analogInPin);            
  if(sensorValue < 100){
  //take a picture 
    digitalWrite(9,LOW); 
    delay(5);
    digitalWrite(9,HIGH);
    delay(200);
    digitalWrite(9,LOW);
  }

  
}