gistfile1.ino

int focusPin = 2;
int shutterPin = 3;

void setup() {
  pinMode(focusPin, OUTPUT);
  pinMode(shutterPin, OUTPUT);
  pinMode(13, OUTPUT);
}

int v = 0;
int threshold = 20;
int d = 30000;

void initPin() {
  digitalWrite(focusPin, LOW);
  digitalWrite(shutterPin, LOW);
  digitalWrite(13, LOW);
}

void loop() {
  initPin();
  int v = analogRead(0);
  if (v > threshold) {
    digitalWrite(13, HIGH);
    digitalWrite(focusPin, HIGH);
    delay(1000);
    digitalWrite(focusPin, LOW);
    delay(500);
    digitalWrite(shutterPin, HIGH);
    delay(500);
    initPin();
    delay(d);
  }
  delay(500);
}