var screenWidth = $(window).width();

if( screenWidth < 500){

    var paddingWidth = 15;

    var scale = (screenWidth - paddingWidth*2) / 500;

    var trans = paddingWidth/scale;

    $('#gridContainer').css({

        'transform-origin': '0 0',

        'transform': 'scale('+scale+') translate('+trans+'px, '+trans+'px)',

        '-webkit-transform': 'scale('+scale+') translate('+trans+'px, '+trans+'px)',

    })

}