#include <avr/io.h>
#include <util/delay.h>

void setup() {
DDRD |= (1<<0);
DDRD |= (1<<1);
DDRD |= (1<<2);

DDRB &= ~(1<<0);
DDRB &= ~(1<<1);
DDRB &= ~(1<<0);

}
int main(){
setup();
int a=0;
int b=0;
int c=0;
int x=0;
while(1){
if (PINB &(1<<0) && a==0){
  
  a=1;
  _delay_ms(500);
  
  }
else if (PINB&(1<<0) && a==1){
  
  a=0;
 _delay_ms(500);
  
  
}
 
 if (PINB &(1<<1) && b==0 && a==1 ){
 
 b=1;
  x=1;
   c=0;
   _delay_ms(500);
  }
else if (PINB&(1<<1) && b==1){
  
  b=0;
   c=0;
 x=0;
   _delay_ms(500);
}

 if (PINB &(1<<2) && c==0 && a==1 ){
  
  c=1;
   b=0;
 x=2;
   _delay_ms(500);
  }
else if (PINB&(1<<2) && c==1 ){
  
  c=0;
   b=0;
  x=0;
   _delay_ms(500);
}

switch(x){
  case 1:
    PORTD &=~(1<<2);
    _delay_ms(1000);
    
    PORTD |=(1<<1);
  
 
  break;
  case 2:
   PORTD &=~(1<<1);
   _delay_ms(1000);
  PORTD |=(1<<2);
  
  break;
default:
if(a==1){

PORTD &=~(1<<1);
PORTD &=~(1<<2);
 _delay_ms(1000);
PORTD |=(1<<0);
}
break;
}
}return;
}