int redPin=9;
int bright0=0;
int bright1=64;
int bright2=128;
int bright3=192;
int bright4=255;
int wait=1000;

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,bright0);
delay(wait);

analogWrite(redPin,bright1);
delay(wait);

analogWrite(redPin,bright2);
delay(wait);

analogWrite(redPin,bright3);
delay(wait);

analogWrite(redPin,bright4);
delay(wait);
}