//blink even leds in port k

#include <stdint.h>

#define DDRK  (*(volatile uint8_t*)0x30)
#define PORTK (*(volatile uint8_t*)0x31)

void delay1sec(void){
    TCNT1  = 0;
    TCCR1A = 0x00;
    TCCR1B = 0x05;      

    while (TCNT1 < 15625);

    TCCR1B = 0x00;      
}

void setup() {
    DDRK = 0xFF;        
}

void loop() {
  for(int i =0; i<8 ; i++){
    PORTK |= (1<<i);
    delay1sec();
    PORTK &= ~(1<<i);
    delay1sec();
    i += 1; 
  }
  
}