This code shows how to use display objects like GradientType, InterpolationMethod, SpreadMethod and scale9Grid.

var rect:Shape = new Shape();
rect.graphics.lineStyle(10, 0x000000);
var matrix:Matrix = new Matrix();
matrix.createGradientBox(15, 15, Math.PI, 10, 10);
rect.graphics.beginGradientFill(GradientType.RADIAL,[0x000000, 0x76A3DA], [100, 100],
            [0, 0xFF],matrix,SpreadMethod.REFLECT,InterpolationMethod.RGB,0.9);

rect.graphics.drawRect(0, 0, 90, 90);

var grid:Rectangle = new Rectangle(20, 20, 50, 50);
rect.scale9Grid = grid ;

addChild(rect);

var timer:Timer = new Timer(80);
timer.start();
timer.addEventListener(TimerEvent.TIMER, imageResize);

var scale:Number = 1.01;

function imageResize(event:TimerEvent):void {
    rect.scaleX *= scale;
    rect.scaleY *= scale;

    if (rect.scaleX > 2.0) {
        scale = 0.99;
    }
    if (rect.scaleX < 1.0) {
        scale = 1.01;
    }
}

Tags: createGradientBox, GradientType, InterpolationMethod, Rectangle, scale9Grid, SpreadMethod, Timer