void refreshLCD(void){
    LCD_Clear();

    //write status
    if(isPlaying==1){
        LCD_GoTo(4,0);
        LCD_WriteText("Playing!");
    }
    else{
        LCD_GoTo(5,0);
        LCD_WriteText("Paused");
    }

    //write bpm
    LCD_GoTo(0,1);
    LCD_WriteText("BPM:");
    LCD_WriteInteger(bpm);

    //write "currentbeat / beat"
    LCD_GoTo(8,1);
    LCD_WriteText("Beat:");
    LCD_WriteInteger(currentBeat);
    LCD_WriteText("/");
    LCD_WriteInteger(beat);
}

ISR(TIMER2_OVF_vect) {
    ++currentOverflowCount;

    if(currentOverflowCount>=expectedOverflowCount){
        TIMSK|=(1<<OCIE2);
        TIMSK&=~(1<<TOIE2);
    }
}

ISR(TIMER2_COMP_vect){
    TCNT2 = 0;
    TIMSK&=~(1<<OCIE2);
    TIMSK|=(1<<TOIE2);

    ++currentBeat;
    if ((currentBeat % beat == 1) || (currentBeat > beat)){
        tick(1);
        currentBeat = 1;
    }
    else {
        tick(0);
    }

    currentOverflowCount=0;
    refreshLCD();
}