#define r 13
#define o 10
#define g 7
void setup() {
pinMode(r, OUTPUT);
pinMode(o, OUTPUT);
pinMode(g, OUTPUT);

}

void loop() {
digitalWrite(r, HIGH);
delay(3000);
digitalWrite(r, LOW);

digitalWrite(o, HIGH);
delay(1000);
digitalWrite(o, LOW);

digitalWrite(g, HIGH);
delay(3000);
digitalWrite(g, LOW);

digitalWrite(o, HIGH);
delay(1000);
digitalWrite(o, LOW);

}