flash red -> green -> blue

RGBFlash.ino

// RGB flasher for Darius :D
int red = 3;
int blu = 5;
int grn = 9;

void setup() {
  pinMode(red, OUTPUT);
  pinMode(grn, OUTPUT);
  pinMode(blu, OUTPUT);
  digitalWrite(red, LOW);
  digitalWrite(grn, LOW);
  digitalWrite(blu, LOW);
}

void loop() {
  digitalWrite(red, HIGH);
  delay(1000);            
  digitalWrite(red, LOW); 
  digitalWrite(grn, HIGH);
  delay(1000);            
  digitalWrite(grn, LOW); 
  digitalWrite(blu, HIGH);
  delay(1000);            
  digitalWrite(blu, LOW); 
}