int SW1;
int SW2;
int swcurrent = 0;

void setup() {
  pinMode(13, INPUT_PULLUP);
  pinMode(12, INPUT_PULLUP);

  pinMode(15, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(18, OUTPUT);
}
void loop() {
  SW1 = digitalRead(13);
  delay(10);
  ///SW2 = digitalRead(12);
  if (SW1 == 0) {
    swcurrent = swcurrent +1;
  }
Serial.println();(swcurrent);
  if(swcurrent == 0){
    ledleft();
  }else if(swcurrent == 1){
    led_in_out();
  }else if(swcurrent == 2){
    ledright();
  }
  if(swcurrent >=3){
    swcurrent =0;
  }
}

///////////////function led left
void ledleft() {
  digitalWrite(18, HIGH);
  delay(200);
  digitalWrite(18, LOW);
  delay(200);
  digitalWrite(5, HIGH);
  delay(200);
  digitalWrite(5, LOW);
  delay(200);
  digitalWrite(4, HIGH);
  delay(200);
  digitalWrite(4, LOW);
  delay(200);
  digitalWrite(15, HIGH);
  delay(200);
  digitalWrite(15, LOW);
  delay(200);
}
///////////////function led Right
void ledright() {
  digitalWrite(15, HIGH);
  delay(500);
  digitalWrite(15, LOW);
  delay(500);
  digitalWrite(4, HIGH);
  delay(500);
  digitalWrite(4, LOW);
  delay(500);
  digitalWrite(5, HIGH);
  delay(500);
  digitalWrite(5, LOW);
  delay(500);
  digitalWrite(18, HIGH);
  delay(500);
  digitalWrite(18, LOW);
  delay(500);
}
///////////////function ledinout
void led_in_out() {
  digitalWrite(18, HIGH);
  delay(100);
  digitalWrite(5, HIGH);
  delay(100);
  digitalWrite(4, HIGH);
  delay(100);
  digitalWrite(15, HIGH);
  delay(100);

  digitalWrite(18, LOW);
  delay(100);
  digitalWrite(5, LOW);
  delay(100);
  digitalWrite(4, LOW);
  delay(100);
  digitalWrite(15, LOW);
  delay(100);
}