function ExecuteRect(code)
{
   function rectangle(wid,hei,col)

   {

    let obj = {
        width:0,
        height:0,
        color:0,
        calcArea:function(){return Number(this.height)*Number(this.width); }

    };
    obj.width = wid;
    obj.height = hei;
    obj.color = col;

    return obj;
   }

    let executable = eval(code);
    new Function(executable)();

}



let code =
        `let rect = rectangle(4, 5, 'red');
        console.log(rect.width);
        console.log(rect.height);
        console.log(rect.color);
        console.log(rect.calcArea());`;
        ExecuteRect(code);