int led = 9;
int sensor = A0;
int leitura = 0;
int pwm = 0;

void setup() 
{
pinMode(led, OUTPUT);

}
void loop()
{

leitura = analogRead(sensor);
if (leitura <= 1000)
{
  pwm = map(leitura, 8,1016,255,0);
  analogWrite(led, pwm);
}
else 
{
  analogWrite(led, LOW);
}


}