int sensorValue=0;
int led1=9;
void setup()
{
  pinMode (A0, INPUT  );
  pinMode (led1,OUTPUT );
  Serial.begin(9600);

}

void loop ()
{
  sensorValue=analogRead(A0 );
  Serial.println (sensorValue);//(());
  if(sensorValue>180)
  digitalWrite(led1,HIGH );
  else
  digitalWrite(led1,LOW );
}