var myProject = app.project;

    var myComposition = myProject.items.addComp("After_Effects_CS5_scripting_changes", 1920, 1080, 1.0, 5, 24);

    // Use the $.os method to query the operating system.

    var myTextLayer = myComposition.layers.addText("After Effects CS5 on "+"\r"+$.os);

    var myTextDocument = myTextLayer.property("ADBE Text Properties").property("ADBE Text Document");

    var textDocument1 = myTextDocument.value;

    var myCamera = myComposition.layers.addCamera("camera_layer",[960,540]);

    // new attribues for setting layer and footage item label colors

    myComposition.label = 16;
    myTextLayer.label = 13;
    myCamera.label = 0;

    // new attributes for setting advanced motion blur parameters

    myComposition.motionBlurAdaptiveSampleLimit = 256;
    myComposition.motionBlurSamplesPerFrame = 64;

    // new option for making each character orient toward the camera,
    // which depends on the layer having the per-character 3D switch on

    myTextLayer.threeDPerChar = true;
    myTextLayer.autoOrient = AutoOrientType.CHARACTERS_TOWARD_CAMERA;

    // new text tracking (spacing) attribute

    textDocument1.tracking = 50;

    textDocument1.fontSize = 120;
    textDocument1.strokeWidth = 2;
    textDocument1.justification = ParagraphJustification.CENTER_JUSTIFY;

    myTextDocument.setValue(textDocument1);