The idea is like that old game where you have to memorize the sequence and repeat it later.
As soon as the entire building appears and Ethan is standing right next to it, a fire will break out... and then a dialog box will pop up saying “my turn.” You then have to click on the same window where the fire broke out.
If you click correctly, two fire spots will then appear (in random windows) and “my turn” will pop up again… So you need to click on the two windows where the fires appeared, in the same order they appeared before…
Then three fire spots will appear… and the whole process repeats.
This back-and-forth between the game’s turn and your turn will continue for 9 rounds. If you correctly identify all 9 windows where the fire appeared, in the correct order, by the end, you’ll advance.
If you get any of them wrong, you’ll have to start all over again from the first window.
If you don’t have a good memory, write down the windows and the order they appear in on a piece of paper.
You’ll definitely be able to advance from there.
Translated with DeepL.com (free version)