コピペ元
http://blog.ryusei-ing.com/2009/06/06155302.html
[sourcecode language=”java”]
import flash.display.Bitmap;
import flash.display.BitmapData;
var myBitmapData:BitmapData = new BitmapData (2, 2, true, 0x00000000);
myBitmapData.setPixel32 (1, 1, 0xFF000000);
myBitmapData.setPixel32 (1, 1, 0xFFFFFFFF);
var mySprite:Sprite = new Sprite ();
mySprite.graphics.beginBitmapFill (myBitmapData, null, true, true);
mySprite.graphics.drawRect (0, 0, stage.stageWidth, stage.stageHeight);
addChild (mySprite);
[/sourcecode]
04〜06の数値を変更すればパターンや色の変更が可能。