IOS icon bounce animation generator

/**
 * Generate keyframe for CSS3 animation
 * ios bounce icon effect
 * @size = bounce size (sample: 10)
 * @onFrames = % time on frames (for delay or other effect 0-100) (sample: 50)
 */
function buildFrames(size, onFrames)
{
    var source = ["0", "60", "83", "100", "114", "124", "128", "128", "124", "114", "100", "83", "60", "32", "0", "0", "18", "28", "32", "28", "18", "0"];

    var multipler = [];
    source.forEach(function(i){
        multipler.push(i/128);
    });


    var sizes = [];
    multipler.forEach(function(i){
        sizes.push(i*size);
    });

    var timing = [];
    var rate = 100/30;

    var framerate = onFrames/30;
    var result = [];

   
    sizes.forEach(function(i, idx){
        result.push((idx*framerate).toFixed(2)+"% { margin-top:-"+ i +"px; }");
    });

    result.forEach(function(i){ console.log(i) });

    return result;
}