Javascript/ヒラヒラ落ちる

function sFunc(n) {
    var rakkaDiv = document.createElement("div");
    rakkaDiv.className = "hira";
    rakkaDiv.innerHTML = "◆";
    for(var i = 0; i < n; i++) {
        cloneFunc(rakkaDiv);
    }
}

function cloneFunc(clone) {
    var divClone = clone.cloneNode(true);
    divClone.style.left = 100 * Math.random() + "%";
    divClone.style.animationDelay = Math.random()*8 + "s";
    divClone.style.fontSize = Math.floor(20 * Math.random() + 10) + "px";

    switch(Math.floor(Math.random()*5)) {
        case 0: var divColor = "#fe8622"; break;
        case 1: var divColor = "#674ade"; break;
        case 2: var divColor = "#3aba38"; break;
        case 3: var divColor = "#12ddac"; break;
        case 4: var divColor = "#ddccdd"; break;
    }
    divClone.style.color = divColor;

    document.body.appendChild(divClone);
    divClone.addEventListener("animationend", function() {
        this.parentNode.removeChild(this);
        var rakkaDiv = document.createElement("div");
        rakkaDiv.className = "hira";
        rakkaDiv.innerHTML = "◆";
        cloneFunc(rakkaDiv);
    }, false)
}