int r = 13;
int g = 12;
int b = 11;
void setup() {
pinMode(r,OUTPUT);
pinMode(g,OUTPUT);
pinMode(b,OUTPUT);
}
void loop() {
digitalWrite(r, HIGH);
delay(1000); 
digitalWrite(r, LOW);
digitalWrite(g, HIGH);
delay(1000);
digitalWrite(g, LOW);
digitalWrite(b, HIGH);
delay(1000);
digitalWrite(b,LOW);
}