int drehrad = 1000;
int regler = A0;
int regler2 = A1;
int counter = 0;
int side = 0;
bool left = false;

void setup() {
  // put your setup code here, to run once:
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(3, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  while (analogRead(regler2) >= 500){
  drehrad = analogRead(regler);
  if (counter >= drehrad) {
    counter = 0;
    left = !left;
    if (left == true){
      side = 1;
    } else {
      side = 2;
    }
  }  
  if (side == 1){
    digitalWrite(7, HIGH);
    delay(10);
    digitalWrite(7, LOW);
    side = 0;
  }
  if (side == 2){
    digitalWrite(6, HIGH);
    delay(10);
    digitalWrite(6, LOW);
    delay(drehrad);
    side = 0;
  }
  counter ++;
  delay (1);
  }
}