#include "at90s8515.h"

int count;

int main (void) {
  DDRB = 0xff; // configure as output
  PORTB = 0xff; // turn all leds off

  SREG |= 1<<7; // Global Interrupt enable
  TIMSK |= 1<<1; // Timer/Counter0 Overflow Interrupt enable
  TCCR0 = 0x05; // start Timer0 with prescale CLK/1024
  count = 0;

  while (1) {}
  return 0;
}

void TIM0_OVF (void) SIGNAL;

void TIM0_OVF (void) {
  count++;
  if (count == 140) {
    PORTB = ~PORTB;
    count = 0;
  }
}