#define white 8
#define red 7
#define green 3
#define blue 0

void setup() {
  pinMode(white, OUTPUT);
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(blue, OUTPUT);
}

void loop() {

  digitalWrite(red, HIGH);
  delay(500);
  digitalWrite(red, LOW);
  digitalWrite(green, HIGH);
  delay(500);
  digitalWrite(green, LOW);
  digitalWrite(blue, HIGH);
  delay(500);
  digitalWrite(blue, LOW);
  digitalWrite(white, HIGH);
  delay(500);
  digitalWrite(white, LOW);
  delay(1000);

}