int redPin=9;
int bright=255;
int medium=50;
int low=5;

void setup() {
  // put your setup code here, to run once:
pinMode(redPin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
analogWrite(redPin,bright);
delay(1000);
analogWrite(redPin,medium);
delay(1000);
analogWrite(redPin,low);
delay(1000);
}