BranchOfTreeSpecification ballBranch = new BallDecorator(plainBranch);
BranchOfTreeSpecification starBranch = new StarDecorator(plainBranch);
XMASTree myTree2Light2Ball = new XMASTree(4);
myTree2Light2Ball.addDecorator(lightBranch);
myTree2Light2Ball.animate();
myTree2Light2Ball.addDecorator(lightBranch);
myTree2Light2Ball.addDecorator(ballBranch);
myTree2Light2Ball.addDecorator(ballBranch);
System.out.println("\nXMAS tree with 2 lights - 2 ball");