int16_t pin1=3;
int16_t pin2=4;
int16_t pin3=5;
int16_t pin4=6;
int16_t rts=1000;

void setup() {
  // put your setup code here, to run once:
pinMode(pin1, OUTPUT);
pinMode(pin2, OUTPUT);
pinMode(pin3, OUTPUT);
pinMode(pin4, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(pin1, LOW);
digitalWrite(pin2, LOW);
digitalWrite(pin3, LOW);
digitalWrite(pin4, LOW);
delay(rts);
digitalWrite(pin1,HIGH);
digitalWrite(pin2, LOW);
digitalWrite(pin3, LOW);
digitalWrite(pin4, LOW);
delay(rts);
digitalWrite(pin1, LOW);
digitalWrite(pin2,HIGH);
digitalWrite(pin3, LOW);
digitalWrite(pin4, LOW);
delay(rts);
digitalWrite(pin1,HIGH);
digitalWrite(pin2,HIGH);
digitalWrite(pin3, LOW);
digitalWrite(pin4, LOW);
delay(rts);
digitalWrite(pin1, LOW);
digitalWrite(pin2, LOW);
digitalWrite(pin3, HIGH);
digitalWrite(pin4, LOW);
delay(rts);
digitalWrite(pin1, HIGH);
digitalWrite(pin2, LOW);
digitalWrite(pin3, HIGH);
digitalWrite(pin4, LOW);
delay(rts);
digitalWrite(pin1, LOW);
digitalWrite(pin2, HIGH);
digitalWrite(pin3, HIGH);
digitalWrite(pin4, LOW);
delay(rts);
digitalWrite(pin1, HIGH);
digitalWrite(pin2, HIGH);
digitalWrite(pin3, HIGH);
digitalWrite(pin4, LOW);
delay(rts);
digitalWrite(pin1, LOW);
digitalWrite(pin2, LOW);
digitalWrite(pin3, LOW);
digitalWrite(pin4, HIGH);
delay(rts);
digitalWrite(pin1, HIGH);
digitalWrite(pin2, LOW);
digitalWrite(pin3, LOW);
digitalWrite(pin4, HIGH);
delay(rts);
digitalWrite(pin1, LOW);
digitalWrite(pin2, HIGH);
digitalWrite(pin3, LOW);
digitalWrite(pin4, HIGH);
delay(rts);
digitalWrite(pin1, HIGH);
digitalWrite(pin2, HIGH);
digitalWrite(pin3, LOW);
digitalWrite(pin4, HIGH);
delay(rts);
digitalWrite(pin1, LOW);
digitalWrite(pin2, LOW);
digitalWrite(pin3, HIGH);
digitalWrite(pin4, HIGH);
delay(rts);
digitalWrite(pin1, HIGH);
digitalWrite(pin2, LOW);
digitalWrite(pin3, HIGH);
digitalWrite(pin4, HIGH);
delay(rts);
digitalWrite(pin1, LOW);
digitalWrite(pin2, HIGH);
digitalWrite(pin3, HIGH);
digitalWrite(pin4, HIGH);
delay(rts);
digitalWrite(pin1, HIGH);
digitalWrite(pin2, HIGH);
digitalWrite(pin3, HIGH);
digitalWrite(pin4, HIGH);
delay(rts);


}