void setup()
{
pinMode(13, OUTPUT);
pinMode(12, OUTPUT);
pinMode(8, OUTPUT);
pinMode(4, OUTPUT);
pinMode(2, OUTPUT);
}
void loop()
{
digitalWrite(13, HIGH);
delay(900);
digitalWrite(13, LOW);
delay(500);
digitalWrite(12, HIGH);
delay(800);
digitalWrite(12, LOW);
delay(500);
digitalWrite(8, HIGH);
delay(700);
digitalWrite(8, LOW);
delay(500);
digitalWrite(4, HIGH);
delay(600);
digitalWrite(4, LOW);
delay(500);
digitalWrite(2, HIGH);
delay(500);
digitalWrite(2, LOW);
delay(500);
}