int pinsensor = A0;
int pinled = 2;
int nilaisensor;

void setup() {

Serial.begin(9600);
pinMode(pinsensor, INPUT);
pinMode(pinled, OUTPUT);
}

void loop() {
nilaisensor = analogRead(pinsensor);
Serial.println(nilaisensor);

if(nilaisensor == 1023);
{
  digitalWrite(pinled, HIGH);
  delay(100);
  digitalWrite(pinled, LOW);
  delay(100);
}

if(nilaisensor == 1015)
{
  digitalWrite(pinled, HIGH);
}
else
digitalWrite(pinled, LOW);
}