// ==UserScript==
// @name         Playing Field Grid Script
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  customize playing field grid
// @author       Oki
// @match        https://*.jstris.jezevec10.com/*
// @grant        none
// ==/UserScript==
/**************************
Playing Field Grid Script
**************************/
(function() {
window.addEventListener('load', function(){
bgLayer.style.display="none";
var newItem = document.createElement("table");
newItem.style.width = bgLayer.width-8 + "px";
newItem.style.height = bgLayer.height + "px";
newItem.innerHTML = ("<tr>"+"<td style='border:2px solid white;'></td>".repeat(10)+"</tr>").repeat(20)
stage.insertBefore(newItem, stage.childNodes[0]);
});
})();