char led[] = {4, 5, 6, 7, 8, 9, 10, 11, 12, 13};
char l;
float delayTime = 18;

char runSW = 3;
bool runSWstate = 0;

char resetSW = 2;
bool resetSWstate = 0;

void setup()
{
  for(char l=0; l<=9; l++)
  {
    pinMode(led[l], OUTPUT);
    digitalWrite(led[l], LOW);
  }

  pinMode(runSW, INPUT_PULLUP);
  pinMode(resetSW, INPUT_PULLUP);

}



void loop()
{
  runSWstate = !digitalRead(runSW);
  //let the leds run very fast
  if(runSWstate==HIGH)
  {
    for(l=0; l<=9; l++)
    {
      digitalWrite(led[l], HIGH);
      delay(18);
      digitalWrite(led[l], LOW);
    }
    delayTime = 18;
  }

  //gives it some "dynamically friction" when slowing down
  if(runSWstate==LOW)
  {
    for(l=0; l<=9; l++)
    {
      if(delayTime < 600)
      {
        digitalWrite(led[l], HIGH);
        delay(delayTime*1.2);
        digitalWrite(led[l], LOW);
      }
      delayTime = delayTime*1.2;
    }
  }
}