int a = 0;

void setup(){
  pinMode(A5,INPUT);
  pinMode(9,OUTPUT);
  Serial.begin(9600);
}

void loop(){
  int a = analogRead(A5);
  Serial.println(a);
  if(a > 5){
    analogWrite(9,255);
  }
  else {
    analogWrite(9,0);
  }
  delay(10);
}