How to attach animation?

Question

css

How to attach this animation:

//Функция для красивого отображения времени.
function animation(vibor,param) {
  vibor.html(param)
    .css({'marginTop':'-20px','opacity':'0'})
    .animate({'marginTop':'0px','opacity':'1'});
}

to my timer?

<div id="timer" class="winner1" style="color:#fff; font-weight:bold;"><span id="timer-1" class="timer-digit">0</span><span id="timer-2" class="timer-digit">2</span>:<span id="timer-3" class="timer-digit">0</span><span id="timer-4" class="timer-digit">0</span>
                                            </div>

Answer 1

Why not add animation
in the counter code itself?
because if so,
it's not clear what to give in param...