int pinR = 5;
int pinG = 6;
int pinB = 7;
void setup() {
  // put your setup code here, to run once:
  pinMode(pinR, OUTPUT);
  pinMode(pinG, OUTPUT);
  pinMode(pinB, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(pinR, HIGH);
  delay(1000);
  digitalWrite(pinR, LOW);
  delay(1000);
  digitalWrite(pinG, HIGH);
  delay(1000);
  digitalWrite(pinG, LOW);
  delay(1000);
  digitalWrite(pinB, HIGH);
  delay(1000);
  digitalWrite(pinB, LOW);
  delay(1000);
}