#define F_CPU 1000000L

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

#define LED0 (1<<0)
#define LED1 (1<<PA1)
#define LED2 (1<<PA2)
#define LED3 (1<<PA3)
#define LED4 (1<<PA4)
#define LED5 (1<<PA5)
#define LED6 (1<<PA6)
#define LED7 (1<<PA7)


int main(void){
    DDRA |= LED0 | LED1 | LED2 | LED3 | LED4 | LED5 | LED6 | LED7;

    uint8_t phase = 0;
    uint8_t dir = 0;
    while(1){

        switch(phase){
            case 0:{
                PORTA |= LED0 | LED1;
                PORTA &= ~(LED2 | LED3);
                if(dir==0) {phase += 1; _delay_ms(1000);}
                else {dir = 0;}
                break;
            }
            case 1:{
                PORTA |= LED2 | LED3;
                PORTA &= ~(LED0 | LED1);
                PORTA &= ~(LED4 | LED5);
                if(dir==0) {phase += 1; _delay_ms(1000);}
                else {phase -= 1; _delay_ms(1000);}
                break;
            }
            case 2:{
                PORTA |= LED4 | LED5;
                PORTA &= ~(LED6 | LED7);
                PORTA &= ~(LED2 | LED3);
                if(dir==0) {phase += 1; _delay_ms(1000);}
                else {phase -= 1; _delay_ms(1000);}
                break;
            }
            case 3:{
                PORTA |= LED6 | LED7;
                PORTA &= ~(LED4 | LED5);
                if(dir==0) {dir = 1;}
                else {phase -= 1; _delay_ms(1000);}
                break;
            }


        }


        //PORTA |= LED0 | LED1 | LED2 | LED3 | LED4 | LED5 | LED6 | LED7;
//
//      _delay_ms(1000);
//
//      PORTA &= ~(LED0 | LED1 | LED2 | LED3 | LED4 | LED5 | LED6 | LED7);
//
//      _delay_ms(1000);


        //if(!(PINA&LED0)){
        //  _delay_ms(50);
        //  if((PINA&LED0)){
        //      PORTA |= LED0;
        //      _delay_ms(80);
        //      PORTA &= ~LED0;
        //      _delay_ms(80);
        //  }
        //}
    }

}