Pet's Riddles answers Start the train

Let's help the cat solve the riddle and find the answers in level 52. Here is a detailed walkthrough for level 52 in Pet's Riddles with the challenge "Start the train". You can view the hints in the image below, or read the detailed text walkthrough below.

Switch levers in the following sequence: blue, red, blue, yellow, green, red, yellow, green.

If you have another level 52 puzzle in your game, go to the Pet's Riddles Answer List page for all puzzles and select it from the challenge text.