#include <Arduino.h>
#include <avr/io.h>
#include <math.h>
 
 
void setup() {
DDRD |=(1<<0);
DDRD |=(1<<1);
DDRD |=(1<<2);
DDRD |=(1<<3);
DDRD |=(1<<4);
DDRD |=(1<<5);
DDRD |=(1<<6);
DDRD |=(1<<7);
DDRB &~(1<<0);
DDRB &~ (1<<1);
DDRB |= (1<<2);
DDRB |= (1<<3);
DDRB |= (1<<4);
DDRB |= (1<<5);
DDRB |= (1<<6);
DDRB |= (1<<7);
DDRB |= (1<<8);
 
//PINB |=(1<<0);
 
}

 int ce; //Counter EinerZiffern
 int cz; //Counter Zehnerziffern
 int ch; //Counter HunderterZiffern
 int ct; //Counter TausenderZiffern
 int c;  //Counter
int main() {
  setup();
  int i=0;
  int p = 0;
  _delay_ms(600);
  double array[10]={0x5F,0x6,0x3B,0x2F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
 
    while (1){
            for(ct=0; ct<10; ct++){
             for(ch=0; ch<10; ch++){ 
              for(cz=0; cz<10; cz++){
                for(ce=0; ce<10; ce++){
                  for(c=0;c<15; c++){
                PORTD=array[ce];
                PORTB&=~(1<<5);
                _delay_ms(10);
                PORTB|=(1<<5);
                
                PORTD=array[cz];
                PORTB&=~(1<<4);
                _delay_ms(10);
                PORTB|=(1<<4);
 
                PORTD=array[ch];
                PORTB&=~(1<<3);
                _delay_ms(10);
                PORTB|=(1<<3);
 
                PORTD=array[ct]; 
                PORTB&=~(1<<2);
                _delay_ms(10);
                PORTB|=(1<<2);
               }}}}}}}