Arduino EMF

int inPin= 5;
int pin11=11;

void setup()
{
  Serial.begin(9600);
}

void loop()
{
  int val = analogRead(inPin);

  if (val >= 1)
  {
    val = constrain(val,1,1000);
    val = map(val, 650, 750, 1, 255);
    analogWrite(pin11,val);

  }
  else
  {
    analogWrite(pin11,0);
  }

  Serial.println(val);

}