int rightR = 4;
int rightO = 3;
int rightG = 2;

void setup() {

  DDRB = 0xFF;
  DDRB = 0xFF;
}

void loop() {
  digitalWrite(rightR,LOW);
  digitalWrite(rightG, HIGH);
  delay(2000);
  digitalWrite(rightG, LOW);
  digitalWrite(rightO, HIGH);
  delay(1000);
  digitalWrite(rightO,LOW);
  digitalWrite(rightR, HIGH);
  delay(2000);
}