#include <ShiftIn.h>
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif
#define PIN            6
#define NUMPIXELS      18
Adafruit_NeoPixel Pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
int LED_Ausgabe[8][4]=  //Belegung Feld - LED
{
 {0,1,6,7}, //A3
 {1,2,7,8}, //A4
 {2,3,8,9}, //A5
 {4,5,12,13}, //B1
 {5,6,13,14}, //B2
 {6,7,14,15}, //B3
 {7,8,15,16}, //B4
 {8,9,16,17} //B5;
};
int LED_Ausgabe_1[8][4]=  //Belegung Feld - LED
{
 {0,1,6,7}, //A3
 {1,2,7,8}, //A4
 {2,3,8,9}, //A5
 {4,5,12,13}, //B1
 {5,6,13,14}, //B2
 {6,7,14,15}, //B3
 {7,8,15,16}, //B4
 {8,9,16,17} //B5;
};
// Init ShiftIn instance with a single chip
ShiftIn<1> shift;
char Belegung[8];
int i=0;
int b=0;
int lang=0;
int x=0;
int j=0;
int k=0;
int s=0;
void setup() {
  Serial.begin(9600);
  Pixels.begin();
  Pixels.show();
  // declare pins: pLoadPin, clockEnablePin, dataPin, clockPin
  shift.begin(8, 9, 11, 12);
}

void displayValues() {
  lang=shift.getDataWidth();
  // print out all 8 buttons
  for(i = 0; i < shift.getDataWidth(); i++){
    Serial.print( shift.state(i) );// get state of button i
   Belegung[i] = shift.state(i);}
  Serial.println();
}

void loop() {
  if(shift.update()){ // read in all values. returns true if any button has changed
    displayValues();
   // Clearing();
      for (b=0; b<8; b++){Serial.print(Belegung[b],BIN);}Serial.println();
      Serial.print(lang,DEC);Serial.println();
     for (x=0;x<lang;x++){
      s=x;
/*       switch (Belegung[x]){
         case 0:  {Serial.print("Aus |");break;}
         case 1:  {Serial.print("An |");break;} }      
         switch (Belegung[s]){
        case 0:   for (k=0;k<4;k++) {Pixels.setPixelColor(LED_Ausgabe[s][k],0,0,0);};break;
         case 1:   for (j=0;j<4;j++) {Pixels.setPixelColor(LED_Ausgabe[x][j],0,20,0);};break;}*/
        // if (Belegung[x]==1){for (j=0;j<4;j++) {Pixels.setPixelColor(LED_Ausgabe[x][j],0,20,0);}}
        // else for (k=0;k<4;k++) {Pixels.setPixelColor(LED_Ausgabe_1[x][k],0,0,0);}
         switch (Belegung[s]){
         case 0:   OFF();break;
         case 1:   ON();break;}
         }
       Pixels.show();
  }}
 void Clearing() {
  //for (int ii = 0; ii < 18; ii++) { 
   // Pixels.setPixelColor(ii, 0, 0, 0); 
  
  Pixels.fill(0,0,0);
  Pixels.show();
  
}   
void ON(){for (j=0;j<4;j++) {Pixels.setPixelColor(LED_Ausgabe[s][j],0,20,0);}}
void OFF(){for (k=0;k<4;k++) {Pixels.setPixelColor(LED_Ausgabe[s][k],0,0,0);}}