_root.createEmptyMovieClip("korob",_root.getNextHighestDepth());

colors = [0x444444, 0xffffff];

alphas = [0, 100];

rat = [0, 255];

matrix = {matrixType:"box", x:200, y:200, w:100, h:100, r:0};

with (korob) {

        //lineStyle(1,0x00E644);

        beginGradientFill("linear",colors,alphas,rat,matrix);

        moveTo(200,200);

        lineTo(300,200);

        lineTo(300,300);

        lineTo(200,300);

        korob.endFill();

}