Ich habe für jeden Sensor eigene Abstandsvariable angelegt. (Ist es etwa falsch?)

Code:
// Sensor Links
long laengelinks;
long cm2;
// Sensor Vorne
long laengevorne;
long cm;
// Sensor Rechts
long laengerechts;
long cm3;
// Motor Rechts
const int Motor1Pin1 = 1;
const int Motor1Pin2 = 0;
//Motor Links
const int Motor2Pin1 = 2;
const int Motor2Pin2 = 3;

//int Abstand = 10;

void setup()

{
  // Sensor PINS
//  Serial.begin (9600);
  pinMode(11,OUTPUT);
  pinMode(10,INPUT);
  pinMode(12,OUTPUT);
  
  pinMode(8,OUTPUT);
  pinMode(9,INPUT);
  pinMode(7,OUTPUT);
  
  pinMode(5,OUTPUT);
  pinMode(6,INPUT);
  pinMode(4,OUTPUT);

  // Motor PINS
  pinMode(Motor1Pin1, OUTPUT);   
  pinMode(Motor1Pin2, OUTPUT);   
  pinMode(Motor2Pin1, OUTPUT);   
  pinMode(Motor2Pin2, OUTPUT); 

//  pinMode(13,OUTPUT);
}

void loop()
{

  
   scanvorne();
  if (cm >= 20)
    {
      GoForward();
      delay(300);
    }
  else
    {
      Stop(); 

      scanlinks();
      if (cm >= 20)
        {
          GoLeft();
          delay(250);
        }
      else
        {
          Stop();

          scanrechts();
          if (cm3 >= 20)
            {
               GoRight();
               delay(250);
             }
          else
            {
               Stop();
            }
        }
    }

}




// Sensor Steuerung
void scanvorne()

{
  digitalWrite(12,HIGH);
  
 
  digitalWrite(11,HIGH);
  delayMicroseconds(1000);
  digitalWrite(11,LOW);
  
  laengevorne = pulseIn(10,HIGH);
  
  cm = (laengevorne/2)/29.1;
  
  Serial.print(cm);
  Serial.println("cm1");
  
  
  
}
void scanlinks()

{
  digitalWrite(7,HIGH);
  

  digitalWrite(8,HIGH);
  delayMicroseconds(1000);
  digitalWrite(8,LOW);
  
  laengelinks = pulseIn(9,HIGH);
  
  cm2 = (laengelinks/2)/29.1;
  
  Serial.print(cm2);
  Serial.println("cm2");
  
 
  
}

void scanrechts()

{
  digitalWrite(4,HIGH);
  
  
  digitalWrite(5,HIGH);
  delayMicroseconds(1000);
  digitalWrite(5,LOW);
  
  laengerechts = pulseIn(6,HIGH);
  
  cm3 = (laengerechts/2)/29.1;
  
  Serial.print(cm3);
  Serial.println("cm3");
  
  
  
}

//Motoren Steuerung

void GoForward(){
   
  digitalWrite(Motor1Pin1, HIGH);
  digitalWrite(Motor2Pin1, HIGH);
  digitalWrite(Motor2Pin2, LOW);
  digitalWrite(Motor1Pin2, LOW);
}

void GoBackward(){
  
  digitalWrite(Motor1Pin1, LOW);
  digitalWrite(Motor1Pin2, HIGH);
  digitalWrite(Motor2Pin1, LOW);
  digitalWrite(Motor2Pin2, HIGH);

}

void GoLeft(){
  
  digitalWrite(Motor1Pin1, HIGH);
  digitalWrite(Motor1Pin2, LOW);
  digitalWrite(Motor2Pin1, LOW);
  digitalWrite(Motor2Pin2, LOW);
}

void GoRight(){
  digitalWrite(Motor2Pin2, LOW);
  digitalWrite(Motor2Pin1, HIGH);
  digitalWrite(Motor1Pin1, LOW);
  digitalWrite(Motor1Pin2, LOW);
}

void Stop(){
  digitalWrite(Motor1Pin2, LOW);
  digitalWrite(Motor1Pin1, LOW);
  digitalWrite(Motor2Pin1, LOW);
  digitalWrite(Motor2Pin2, LOW);
}