int sensorPin = A1 ;
int sensorvalue =0,Led = 2;

void setup() {
    Serial.begin(9600);
    pinMode(sensorPin, INPUT);
    pinMode(Led, OUTPUT);
}
void loop()
{
    sensorvalue = analogRead(sensorPin);
    sensorvalue = map(sensorvalue,0,1023,0,1000);
    digitalWrite(Led, HIGH);
    delay(sensorvalue);
    digitalWrite(Led, LOW);
    delay(sensorvalue);
}