int halfPin = 12;
int pushPin = 4;

void setup()   {
  pinMode(halfPin, OUTPUT);
  pinMode(pushPin, OUTPUT);
}


void loop()
{
  // half push
  digitalWrite(halfPin, HIGH);
  delay(1000);

  // phsh shutter 
  digitalWrite(pushPin, HIGH);
  delay(1000);

  digitalWrite(halfPin, LOW);
  digitalWrite(pushPin, LOW);
  delay(2000);

}