How do you get past level 7 on Civil Balls Christmas edition?

The red one cut the right string then the left string then it will fall on the edge of the green box but it will triger the jack-in-the-box and get in the red box. The red one will hit the green one. once it swings at its highest point cut the string. Cut the right string on the gray ball , thn the left. It will fallon the other gray ball. Cut the left string on the green ball, then the right. It will go into the green box. Cut the right string on the last one, then the left.Cut the left sting when it has swung on its highset point. Then it will fall into the yellow box.