Controls the color of a tri-color LED based on analog input

TriLED

int redPin = 9;
int greenPin = 10;
int bluePin = 11;
int analogPin = 3;
int val = 0;

void setup()
{
  pinMode(redPin, OUTPUT);   // sets the pin as output
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);

}

void loop()
{
  val = analogRead(analogPin);   // read the input pin

  if (val <= 341) {
      digitalWrite(redPin, HIGH);
      digitalWrite(greenPin, LOW);
      digitalWrite(bluePin, LOW);
  }
  
  else if (val >= 683) {
      digitalWrite(redPin, LOW);
      digitalWrite(greenPin, LOW);
      digitalWrite(bluePin, HIGH);
  }
  
  else {
      digitalWrite(redPin, LOW);
      digitalWrite(greenPin, HIGH);
      digitalWrite(bluePin, LOW);
  }
}