Energy Stick Arduino Code

int sum = 0;

void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  pinMode(7, OUTPUT);
  digitalWrite(7, LOW);
}

// the loop routine runs over and over again forever:
void loop() {



  for (int i = 0; i <= 10; i++) {
  int sensorValue = analogRead(A0);
    sum = sum + sensorValue;

  }
  if (sum <= 3) {
    digitalWrite(7, HIGH);
    Serial.println(sum);
    delay(2);
    sum = 0;
  }
  else {

    digitalWrite(7, LOW);
    Serial.println(sum);
    sum = 0;
  }

  delay(1);
}