var n:Number = 0.9;
var off:Number = 0x80;
var filter:ColorMatrixFilter = new ColorMatrixFilter( [
        1, 0, 0, 0, -off,
        0, 1, 0, 0, -off,
        0, 0, 1, 0, -off,
        0, 0, 0, 1, -off ] );
var filter2:ColorMatrixFilter = new ColorMatrixFilter( [
        n, 0, 0, 0, off,
        0, n, 0, 0, off,
        0, 0, n, 0, off,
        0, 0, 0, n, off ] );

function onFrame( e:Event ) {
    myBMD.applyFilter( myBMD, myBMD.rect, new Point(), filter );
    myBMD.applyFilter( myBMD, myBMD.rect, new Point(), filter2 );
}