How do I complete the puzzle in Maiden Voyage?

This puzzle requires you to solve it by shooting two pipe valve puzzles before the fuel fills the cage and Anthony, who is also in the train wreckage with you, will either drown in the cage or survive the wreckage depending on your actions. 

(Tip: Saving Anthony will also help you in the final boss)

Steps to complete: 

1. Shoot 1 on the right 

2. Shoot 1 on the right, then 1 on the left straight after 

3. Shoot the top first, middle second and bottom third, allowing a delay between shots of approx. 2 seconds 

4. Repeat 3rd sequence on the left side switches 

Alternatively, you can let him drown, or abandon him by shooting at the locks on the door before Anthony drowns. But, that is entirely down to you and your moral compass...☠️