How do you beat civiballs Christmas edition level 8at home

First you cut the red ball with the blue string. Then the large silver one with the blue string, that should knock the first red one into the box. Next you cut the large silver one on the left side and the green one on the right side. Finally cut the remaining red ball then when the pulley is all the way lowered cut the last silver ball. That should then knock the red one into the box. Hope that helped :).