int red = 9;
int grn = 10;
int blu = 11;
void setup() {
  // put your setup code here, to run once:
pinMode(red, OUTPUT);
pinMode(grn, OUTPUT);
pinMode(blu, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(red, HIGH); //red
delay(500);

digitalWrite(red, HIGH); //yellow
digitalWrite(grn, HIGH);
delay(500);

digitalWrite(grn, HIGH); //green
digitalWrite(red, LOW);
delay(500);

digitalWrite(blu, HIGH); //turq
digitalWrite(grn, HIGH);
delay(500);

digitalWrite(blu, HIGH); //blue
digitalWrite(grn, LOW);
delay(500);

digitalWrite(blu, HIGH); //purps
digitalWrite(red, HIGH);
delay(500);

digitalWrite(red, HIGH); //white
digitalWrite(grn, HIGH);
digitalWrite(blu, HIGH);
delay(500);

digitalWrite(red, LOW); //black
digitalWrite(grn, LOW);
digitalWrite(blu, LOW);
delay(500);

}