int p = 26;
int b = 33;
int r = 32;
void setup() {
  // put your setup code here, to run once:
pinMode(p, OUTPUT);
pinMode(b, OUTPUT);
pinMode(r, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
digitalWrite(p, HIGH);
digitalWrite(b, LOW);
digitalWrite(r, LOW);
delay(200);
digitalWrite(b, LOW);
digitalWrite(p, LOW);
digitalWrite(r, HIGH);
delay(200);
digitalWrite(b, HIGH);
digitalWrite(r, LOW);
digitalWrite(p, LOW);
delay(200);
digitalWrite(r, HIGH);
digitalWrite(p, LOW);
digitalWrite(b, LOW);
delay(200);
}