LED glow by touch sensor

int ledPin=8;
int thresholdValue = 400;
void setup() {
Serial.begin(9600);
pinMode(ledPin,OUTPUT);

}

void loop() {
int sensorValue = analogRead(A0);
Serial.println(sensorValue);
if(sensorValue>thresholdValue)
digitalWrite(ledPin,HIGH);
delay(200);
digitalWrite(ledPin,LOW);
}