#include <avr/io.h>
#include <avr/interrupt.h>

void init_display();
void init_timer1();
volatile uint8_t timeout = 0;

// lookup tables and additional variables to be declared here

int main(void)
{   
    
    init_display();
    init_timer1();
    sei();
    while(1)
    {
        // main code goes here
    }
}

void init_display()
{
    DDRB = 0xFF;
    PORTB = LookUp[0];
}

void init_timer1()
{
    TCCR1B |= (1<<CS12)|(1<<CS10);	// prescaler 1024
    //TCNT1 = 1;			        // initialize counter
    TIMSK1 |= (1 << TOIE1);	        // enable overflow interrupt 
}

ISR(TIMER1_OVF_vect)
{
	// write your ISR here
}