#define PIN_LED1 2
#define PIN_LED2 3
#define PIN_LED3 4
#define PIN_LED4 5
#define PIN_LED5 6
int pos = 0;
int snelheid(100);

void setup()
{
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode (PIN_LED1, OUTPUT);
  pinMode (PIN_LED2, OUTPUT);
  pinMode (PIN_LED3, OUTPUT);
  pinMode (PIN_LED4, OUTPUT);
  pinMode (PIN_LED5, OUTPUT);
}

void loop()
{
  digitalWrite (PIN_LED1, LOW);
  digitalWrite (PIN_LED2, LOW);
  digitalWrite (PIN_LED3, LOW);
  digitalWrite (PIN_LED4, LOW);
  digitalWrite (PIN_LED5, LOW);

  // put your main code here, to run repeatedly:
  for (pos = 0; pos < 1; pos += 1)
  {
    digitalWrite(PIN_LED1, HIGH);
    delay(snelheid);
    digitalWrite(PIN_LED1, LOW);
    digitalWrite(PIN_LED2, HIGH);
    delay(snelheid);
    digitalWrite(PIN_LED2, LOW);
    digitalWrite(PIN_LED3, HIGH);
    delay(snelheid);
    digitalWrite(PIN_LED3, LOW);
    digitalWrite(PIN_LED4, HIGH);
    delay(snelheid);
    digitalWrite(PIN_LED4, LOW);
    digitalWrite(PIN_LED5, HIGH);
    delay(snelheid);
    digitalWrite(PIN_LED5, LOW);

  }
  for (pos = 1; pos > 0; pos -= 1)
  {
    digitalWrite(PIN_LED5, HIGH);
    delay(snelheid);
    digitalWrite(PIN_LED5, LOW);
    digitalWrite(PIN_LED4, HIGH);
    delay(snelheid);
    digitalWrite(PIN_LED4, LOW);
    digitalWrite(PIN_LED3, HIGH);
    delay(snelheid);
    digitalWrite(PIN_LED3, LOW);
    digitalWrite(PIN_LED2, HIGH);
    delay(snelheid);
    digitalWrite(PIN_LED2, LOW);
    digitalWrite(PIN_LED1, HIGH);
    delay(snelheid);
    digitalWrite(PIN_LED1, LOW);

  }
}