How do I solve 'Lighting the Fuse' to get the yellow gun?

To access the yellow gun, there are many locked doors in a transparent tunnel, and the switches to unlock the doors are outside the tunnels. If I activate a switch to unlock one door, I don't have enough time to block the door before it closes.

How can I build a timer to get enough time to block the doors? Is there a time machine?

Solution 1:

You do not need to block the doors: make a "fuse" with blocks and "light" it up. Then move through the doors as they open and close one by one.

Solution 2:

The yellow gun can also be accessed through a different path without solving this puzzle. When you have the yellow gun, this puzzle becomes a lot easier.