int sensorPin = A0;
int sensorValue = 0;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
 sensorValue = analogRead(sensorPin);
Serial.println(sensorValue);

if(sensorValue>800){
  digitalWrite(4, HIGH);
}
else{
  digitalWrite(4, LOW);
}


delay(1000);
}