TestRGB-LED via keyboard

/*
  Sample program to control the color of a RGB LED via the keyboard
  Set the correct PWM pins that are connected to the RGB LED
*/
#define redPin  7
#define greenPin 6
#define bluePin 5
void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  Serial.begin(9600);
}
void loop() {
  while (Serial.available() == 0); // wait until a value is entered
  Serial.println("Enter Red value [0-255]:");
  int red = Serial.parseInt(); // get the PWM value for red led
  delay(100);
  while (Serial.available() == 0); // wait until a value is entered
  Serial.println("Enter Green value [0-255]:");
  int green = Serial.parseInt(); // get the PWM value for green led
  delay(100);
  while (Serial.available() == 0); // wait until a value is entered
  Serial.println("Enter Blue value [0-255]:");
  int blue = Serial.parseInt(); // get the PWM value for blue led
  delay(100);

  analogWrite(redPin, red);
  analogWrite(greenPin, green);
  analogWrite(bluePin, blue);
}