#include <Servo.h>

int fehler = 0 ;
int start = 0 ;
int servo = 0 ;
Servo servo_pin_11;
int a;

void interruptPin2();
void Unterprogramm1();
void Unterprogramm2();
void Unterprogramm3();

void setup()
{
  pinMode( 3 , INPUT);
  pinMode( 4 , INPUT);
  digitalWrite(3, HIGH);
  digitalWrite(4, HIGH);
  servo_pin_11.attach(11);
  pinMode( 5 , OUTPUT);
  pinMode( 6 , OUTPUT);
  pinMode( 7 , OUTPUT);
  pinMode( 8 , OUTPUT);
  pinMode( 9 , OUTPUT);
  attachInterrupt(0,interruptPin2,CHANGE);

  pinMode( 12 , OUTPUT);
  fehler = 0 ;

  start = 0 ;

  servo = 60 ;



  servo_pin_11.write( 25 );

  delay( 100 );

  servo_pin_11.detach();

  digitalWrite( 5 , HIGH );

  digitalWrite( 6 , LOW );

  digitalWrite( 7 , HIGH );

  digitalWrite( 8 , HIGH );

  digitalWrite( 9 , HIGH );

}

void loop()
{
  if (!( digitalRead(4) ))
  {
    start = ( start + 1 ) ;
    digitalWrite( 5 , LOW );
    digitalWrite( 6 , HIGH );
    delay( 500 );
    while ( !( digitalRead(3) ) )
    {
      delay( 50 );
    }

  }
  if (( ( start ) == ( 0 ) ))
  {
    fehler = 0 ;
    digitalWrite( 5 , HIGH );
    digitalWrite( 6 , LOW );
    digitalWrite( 7 , HIGH );
    digitalWrite( 8 , HIGH );
    digitalWrite( 9 , HIGH );
  }
  while ( ( ( start ) == ( 1 ) ) )
  {
    while ( !( digitalRead(3) ) )
    {
      fehler = ( fehler + 1 ) ;
      if (( ( fehler ) == ( 1 ) ))
      {
        digitalWrite( 9 , LOW );
        digitalWrite( 8 , HIGH );
        digitalWrite( 7 , HIGH );
        digitalWrite( 12 , HIGH );
        delay( 500 );
        digitalWrite( 12 , LOW );
      }
      if (( ( fehler ) == ( 2 ) ))
      {
        digitalWrite( 9 , LOW );
        digitalWrite( 8 , LOW );
        digitalWrite( 7 , HIGH );
        digitalWrite( 12 , HIGH );
        delay( 500 );
        digitalWrite( 12 , LOW );
      }
      if (( ( fehler ) == ( 3 ) ))
      {
        digitalWrite( 9 , LOW );
        digitalWrite( 8 , LOW );
        digitalWrite( 7 , LOW );
        digitalWrite( 12 , HIGH );
        delay( 500 );
        digitalWrite( 12 , LOW );
      }
    }

    if (( ( ( start ) == ( 1 ) ) && ( ( ( fehler ) == ( 0 ) ) && !( digitalRead(4) ) ) ))
    {
      Unterprogramm1();
      start = 0 ;
    }
    if (( ( ( start ) == ( 1 ) ) && ( ( ( fehler ) == ( 1 ) ) && !( digitalRead(4) ) ) ))
    {
      Unterprogramm2();
      start = 0 ;
    }
    if (( ( ( start ) == ( 1 ) ) && ( ( ( fehler ) == ( 2 ) ) && !( digitalRead(4) ) ) ))
    {
      Unterprogramm3();
      start = 0 ;
    }
  }

}

void interruptPin2()
{
  start = 0 ;
}

void Unterprogramm2()
{
  servo_pin_11.attach(11);
  servo_pin_11.write( 150 );
  delay( 1500 );
  servo = 60 ;
  for (a=1; a<= ( 45 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo - 1 ) ;
    delay( 30 );
  }
  for (a=1; a<= ( 10 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo + 1 ) ;
    delay( 30 );
  }
  delay( 100 );
  servo_pin_11.write( 150 );
  delay( 1500 );
  servo = 60 ;
  for (a=1; a<= ( 45 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo - 1 ) ;
    delay( 30 );
  }
  for (a=1; a<= ( 10 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo + 1 ) ;
    delay( 30 );
  }
  delay( 100 );
  servo_pin_11.detach();
}

void Unterprogramm3()
{
  start = 0 ;
  servo_pin_11.attach(11);
  servo_pin_11.write( 150 );
  delay( 1500 );
  servo = 60 ;
  for (a=1; a<= ( 45 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo - 1 ) ;
    delay( 30 );
  }
  for (a=1; a<= ( 10 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo + 1 ) ;
    delay( 30 );
  }
  delay( 100 );
  servo_pin_11.detach();
}

void Unterprogramm1()
{
  servo_pin_11.attach(11);
  servo_pin_11.write( 150 );
  delay( 1500 );
  servo = 60 ;
  for (a=1; a<= ( 45 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo - 1 ) ;
    delay( 30 );
  }
  for (a=1; a<= ( 10 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo + 1 ) ;
    delay( 30 );
  }
  delay( 100 );
  servo_pin_11.write( 150 );
  delay( 1500 );
  servo = 60 ;
  for (a=1; a<= ( 45 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo - 1 ) ;
    delay( 30 );
  }
  for (a=1; a<= ( 10 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo + 1 ) ;
    delay( 30 );
  }
  delay( 100 );
  servo_pin_11.write( 150 );
  delay( 1500 );
  servo = 60 ;
  for (a=1; a<= ( 45 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo - 1 ) ;
    delay( 30 );
  }
  for (a=1; a<= ( 10 ); ++a )
  {
    servo_pin_11.write( servo );
    servo = ( servo + 1 ) ;
    delay( 30 );
  }
  delay( 100 );
  servo_pin_11.detach();
}