function zmen(){


        var pole = document.createElement("div");

       pole.style.width="200px";
       pole.style.height="200px";
       pole.style.background="black";
       document.body.appendChild(pole);


       var divy =

           "<div style='height:50px;width:50px;background:aqua;float:left'onclick='pole1()'></div>" +
              "<div style='height:50px;width:50px;background:green;float:left'onclick='pole2()'></div>" +
                "<div style='height:50px;width:50px;background:red;float:left'onclick='pole3()'></div>" +
                  "<div style='height:50px;width:50px;background:grey;float:left'onclick='pole4()'></div>"
 pole.innerHTML = divy;


}
var vytvoreno=0 ;

       if (vytvoreno==O){
            zmen() ;
                        }
else
{
       alert(uz je vytvoren );
}