int r=6;
int g=7;
int b=20;
void setup() {
  pinMode(r,OUTPUT);
  pinMode(g,OUTPUT);
  pinMode(b,OUTPUT);

  // put your setup code here, to run once:

}

void loop() {
  digitalWrite(r,HIGH);
  delay(1000);
    digitalWrite(r,LOW);
      delay(1000);
      digitalWrite(g,HIGH);
  delay(1000);
    digitalWrite(g,LOW);
      delay(1000);
      digitalWrite(b,HIGH);
  delay(1000);
    digitalWrite(b,LOW);
      delay(1000);
  // put your main code here, to run repeatedly:

}