In "Cat Museum", the way the yellow ball is placed is an issue that needs attention. To solve this problem, you can take the following solutions.
1. Players need to complete the previous tasks and go to the third door of the sixth level.
2. Afterwards, you can find four paintings on the wall, which require players to obtain candles first.
3. After using candles to take pictures, you can see that there are red dots in different numbers on the painting.
4. Then count the number of red dots on each painting.
5. Place the yellow balls according to the number of red dots, and the order is "2143".
