How do you beat civiballs Christmas edition level 4

1) Drop the green ball that's all the way to the right into the cannon by cutting the red string and letting it swing to the left and then cutting the green string. Drop it in the cannon, not the green box.
2) This will trigger the cannon and hit the green ball carried by the yellow gold balloon and will move that green ball all the way to the left.

3) Drop the red ball that's all the way to the left into the cannon by cutting the green string.

4) Cut the string holding up the train so the train moves towards the left.

5) Drop the red ball in the middle by cutting the purple string first, and then dropping it into the red box, by cutting the green string.

6) This will hit the green ball hanging in the middle. Cut the purple string to drop it in the box.

7) Drop the green ball hanging from the balloon into the cannon by cutting the red string and wait for it to swing to the right and then cut the remaining string to drop it into the box.