//connect 8 leds to port b blink one by one

#include <stdint.h>

#define DDRB (*(volatile uint8_t*)0x24)
#define PORTB (*(volatile uint8_t*)0x25)

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

    while (TCNT1 < 15625); 

    TCCR1B = 0x00;   
}
void setup() {
  // put your setup code here, to run once:
  DDRB |= (1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<7);



}

void loop() {
  // put your main code here, to run repeatedly:
  PORTB |= (1<<0);
  delay1sec();
  PORTB &= ~((1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<7));
  delay1sec();
  PORTB |= (1<<0)|(1<<1);
  delay1sec();
  PORTB &= ~((1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<7));
  delay1sec();
PORTB |= (1<<0)|(1<<1)|(1<<2);
  delay1sec();
  PORTB &= ~((1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<7));
  delay1sec();
PORTB |= (1<<0)|(1<<1)|(1<<2)|(1<<3);
  delay1sec();
  PORTB &= ~((1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<7));
  delay1sec();
PORTB |= (1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4);
  delay1sec();
  PORTB &= ~((1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<7));
  delay1sec();
PORTB |= (1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5);
  delay1sec();
  PORTB &= ~((1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<7));
  delay1sec();
PORTB |= (1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6);
  delay1sec();
  PORTB &= ~((1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<7));
  delay1sec();
  PORTB |= (1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<7);
  delay1sec();
  PORTB &= ~((1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5)|(1<<6)|(1<<7));
  delay1sec();



}