Simple blink for RGB LED

rgbBlink.ino

int REDPin = 4;    // RED pin 
int GREENPin = 5;  // GREEN pin 
int BLUEPin = 6;   // BLUE pin 

void setup() {
  pinMode(REDPin, OUTPUT);
  pinMode(GREENPin, OUTPUT);
  pinMode(BLUEPin, OUTPUT);
}

void loop() {

  lightRED();
  delay(1000);
  lightOFF();
  delay(1000);
  lightGREEN();
  delay(1000);
  lightOFF();
  delay(1000);
  lightBLUE();
  delay(1000);
  lightOFF();
  delay(1000);
}

void lightRED() {
  analogWrite(REDPin, 255);
  analogWrite(GREENPin, 0);
  analogWrite(BLUEPin, 0);
}

void lightGREEN() {
  analogWrite(REDPin, 0);
  analogWrite(GREENPin, 255);
  analogWrite(BLUEPin, 0);
}

void lightBLUE() {
  analogWrite(REDPin, 0);
  analogWrite(GREENPin, 0);
  analogWrite(BLUEPin, 255);
}

void lightOFF() {
  analogWrite(REDPin, 0);
  analogWrite(GREENPin, 0);
  analogWrite(BLUEPin, 0);
  
}