Detect browser scroll not always

Question

I have an animated header, when "scrolo" the site it changes some things with Animate, IE, when the $(this).scrollTop() > 0 (from 1 to 1 million, but only when it leaves position 0) it animates and turns to position 0 again, it animates to return to the initial layout.

That is, it animates when it leaves the 0 position and animates again if it returns to the 0 position (it would only need to animate in these two moments

Code:

$(document).scroll(function() {
    if($(this).scrollTop() > 0){
        $('.topo_caixa').animate({backgroundColor: '#0033ff'}, 300);
        $('.topo_caixa').animate({height: 50}, 300);
        $('.topo_logo').animate({opacity: 0}, 200);
        $('.topo_botao').animate({marginTop: 10}, 300);
        $('.topo_botao a').animate({color: '#ffffff'}, 300);
        $('.topo_botao_linha').animate({backgroundColor: '#ffffff'}, 300);
    }else{
        $('.topo_caixa').clearQueue();
        $('.topo_logo').clearQueue();
        $('.topo_botao').clearQueue();
        $('.topo_botao a').clearQueue();
        $('.topo_botao_linha').clearQueue();
        $('.topo_caixa').animate({backgroundColor: '#f2f5ff'}, 300);
        $('.topo_caixa').animate({height: 100}, 300);
        $('.topo_logo').animate({opacity: 1}, 200);
        $('.topo_botao').animate({marginTop: 33}, 300);
        $('.topo_botao a').animate({color: '#0166ff'}, 300);
        $('.topo_botao_linha').animate({backgroundColor: '#0166ff'}, 300);
    }
});

The point is, when I’m scrolando the site down there, it keeps running the Animate, because it falls in the if($(this).scrollTop() > 0){... and this ends up consuming processing unnecessarily, because visually does not influence.

I wanted him to perform the animation only when it’s really necessary, only the moment he comes out of the scrollTop 0 or when it comes back to scrollTop 0