尝试在谷歌网页设计与自定义javascript创建动画动态字段

我发现了这个JavaScript，它完美地动画了文本，但是我如何在谷歌网页设计器中分配一个动态字段，到这个脚本?

下面是jsfiddle的链接，关于动态文本如何动画化。

function airport(el, array) {
    var self = el;
    var items = array.length;
    var items2 = array.length;
    var chars = ['a', 'b', 'c', 'd', 'e', 'f', 'g', ' ', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '-', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0','!','¿','?','-','+','.',',',"'",'"','ç','ñ','à','á','è','é','ì','í','ò','ó','ù','ú','À','Á','È','É','Ì','Í','Ò','Ó','Ù','Ú'];
    var longest = 0;
    var opts = {
        transition_speed: 2000,
        fill_space: false,
        longest: 0
    };
    //adds extra spaces to strings in array that are shorter than longest
    function pad(a, b) {
        return a + new Array(b - a.length + 1).join(' ');
    }
    self.innerHTML = '';
    //finds the longest string in array
    while (items--) {
        if(array[items].length > longest) {
            longest = array[items].length;
        }
    }
    //makes all strings in array the same length
    while (items2--) {
        array[items2] = pad(array[items2],longest);
    }
    spans = longest;
    while (spans--) {
        var span = document.createElement('span');
        span.className = 'c' + spans;
        self.insertBefore(span, self.firstChild);
    }
    //a - number of the span element
    //b - for checking char[b] against each letter in array[xx]
    //c - current word in array[c]
    //d - used to track position of each letter in array[xx]
    function init(a, b, c, d) {
        var el = self.querySelector('.c' + a);
        var current_letter = array[c] ? array[c].substring(d, d + 1) : null,
            timer,
            word_len = array[c] ? array[c].trim.length : null,
            prev_word_len = array[c - 1] ? array[c - 1].trim.length : array[0].trim.length;
        if (c >= array.length) { //reset
            timer = setTimeout(function() {
                init(1, 1, 1, 1);
            }, 10);
        }
        else if (d >= longest) { //go to next word
            timer = setTimeout(function() {
                init(0, 0, c + 1, 0);
            }, opts.transition_speed);
            console.log(opts);
        }
        else {
            el.innerHTML = chars[b] === ' ' ? ' ' : chars[b];
            timer = setTimeout(function() {
                if (b > chars.length) {
                    init(a + 1, 0, c, d + 1);
                }
                //go to next letter in chars[] if it doesnt match current letter in array[xx]
                else if (chars[b] !== current_letter.toLowerCase()) {
                    init(a, b + 1, c, d);
                }
                else { //found the letter here
                    el.innerHTML = current_letter === ' ' && opts.fill_space ? ' ' : current_letter;
                    if (word_len < prev_word_len) {
                        if (a > word_len) {
                            for (a; a < prev_word_len; a++) {
                                self.querySelector('.c' + a).innerHTML = '';
                            }
                            d = longest;
                        }
                    }
                    init(a + 1, 0, c, d + 1);
                }
            }, 10);
        }
    }
    init(0, 0, 0, 0);
}
// Call element by selected class or ID
airport(
    document.querySelector('.example'),
    // pass in data to be outputed here
    [ 'Dynamic Content',  ]
);

请帮助，当涉及到JavaScript时，我是一个新手，我正在学习。谢谢你! !