go_pair.js

var cards_list = document.getElementsByClassName("memory-game-inner")[0];
ob = {};
delay = 0;
for (let item of cards_list.childNodes) {
    if (item.tagName == 'DIV') {
        console.log(item)
        let id = item.firstChild.firstChild.firstChild.getAttribute('src').slice(34);
        if (id in ob) {
            (function (id, delay, item) {
                setTimeout(function () { console.log(id); ob[id].firstChild.firstChild.click(); item.firstChild.firstChild.click(); }, delay);
            })(id, delay += 400, item);
        } else { ob[id] = item; }
    }
}
(function (delay) {
    setTimeout(function () { ob = {}; }, delay)
})(delay += 1000);