Innovation Lab #7 Photocell & LED On/Off

const int sensorPin = 0;
const int ledPin = 9;
int lightCal;
int lightVal;

void setup() {
  pinMode(ledPin, OUTPUT);
  lightCal = analogRead(sensorPin);
}

void loop() {
  lightVal = analogRead(sensorPin);
  
  if (lightVal < lightCal - 50) {
    digitalWrite(ledPin, HIGH);
  }
  
  else {
    digitalWrite (ledPin, LOW)
  }
}