3 LED PWM2

byte red = 0;
byte green = 0;
byte blue = 0;

#define redPin 9
#define bluePin 10
#define greenPin 11

void setup()
{
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop()
{
   goForward();
   goReverse();
}

void goForward()
{
  for(red; red < 255; red++)
  {
    analogWrite(redPin, red);
    delay(100);
  }
  for(blue; blue < 255; blue++)
  {
    analogWrite(bluePin, blue);
    delay(100);
  }
  for(green; green < 255; green++)
  {
    analogWrite(greenPin, green);
    delay(100);
  }

}


void goReverse()
{
  for(red; red > 0; red--)
  {
    analogWrite(redPin, red);
    delay(100);
  }
  for(blue; blue > 0; blue--)
  {
    analogWrite(bluePin, blue);
    delay(100);
  }
  for(green; green > 0; green--)
  {
    analogWrite(greenPin, green);
    delay(100);
  }

}