How do you beat level 3 of civiballs Christmas edition

cut the string of the top right red civi ball that will get a green one in aswell as the red one.
Cut the string of the grey civi ball's string and that will make the remaining red civi ball swing.
Before getting the red one in the box, when swinging under neath the green release the green, it will bonce off the red into the green box.
then aim the red one in the box.