int LeftMotorForward = 6; 
int LeftMotorReverse = 7; 
int RightMotorForward = 8;
int RightMotorReverse = 9;



void setup()
{  
  pinMode(LeftMotorForward, OUTPUT); 
  pinMode(LeftMotorReverse, OUTPUT);     
  pinMode(RightMotorForward, OUTPUT); 
  pinMode(RightMotorReverse, OUTPUT); 
}


void loop()
{
  vor();
  delay(1000);
  stoppen();
  delay(1000);  
  rechts();
  delay(1000);
  stoppen();
  delay(1000);
}

///////////// Subroutinen ////////////////////

 void stoppen(){
   digitalWrite(RightMotorForward, LOW); 
   digitalWrite(LeftMotorForward,  LOW);  
   digitalWrite(RightMotorReverse, LOW); 
   digitalWrite(LeftMotorReverse,  LOW);  

    
void vor(){
   digitalWrite(RightMotorForward, HIGH); 
   digitalWrite(LeftMotorForward,  HIGH);  
   digitalWrite(RightMotorReverse, LOW); 
   digitalWrite(LeftMotorReverse,  LOW);  

}

void rechts(){
   digitalWrite(RightMotorForward, LOW); 
   digitalWrite(LeftMotorForward,  HIGH);  
   digitalWrite(RightMotorReverse, HIGH); 
   digitalWrite(LeftMotorReverse,  LOW);  
}