#define RED 4
#define GREEN 3
#define BLUE 2

void glowgreen() {
  digitalWrite(GREEN, HIGH);
  digitalWrite(RED, LOW);
  digitalWrite(BLUE, LOW);
}

void glowblue() {
  digitalWrite(BLUE, HIGH);
  digitalWrite(RED, LOW);
  digitalWrite(GREEN, LOW);
}

void glowred() {
  digitalWrite(RED, HIGH);
  digitalWrite(GREEN, LOW);
  digitalWrite(BLUE, LOW);
}

void reset() {
  digitalWrite(RED, LOW);
  digitalWrite(GREEN, LOW);
  digitalWrite(BLUE, LOW);
}

void setup() {
  // put your setup code here, to run once:
  pinMode(RED, OUTPUT);
  pinMode(GREEN, OUTPUT);
  pinMode(BLUE, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

  glowgreen();
  delay(2000);   // Wait for 2 Sec
  reset();
  delay(200);    // Small delay between resets
  glowblue();
  delay(2000);
  reset();
  delay(200);    // Small delay between resets
  glowred();
  delay(2000);
  reset();
  delay(200);    // Small delay between resets
}