I'd only suggest doing that once every 2 week, and sleeping normally at least each night for the week before for maximal results.
Also, it's a bad idea to code when tired (due to risks of negative productivity): it's better to just think and take notes, draw diagrams etc
BTW I've heard people who are on ADHD drugs report a similar "too focused" attention: a very narrow beam on a very bright spot.
And that darkness, that wraparound blind spot. It doesn't exist. You know what I mean? It, in all likelihood, is not accounted for at all in your reality.
I mean, you don't say to yourself, "gosh, I'm blind to all this stuff". No. the stuff just doesn't exist.
And add habit to the mix, that subconscious robot. Habit that governs this universe-dividing attention.
Titanic feats of reality-conditioning could be happening right under your nose, constantly. And you'd never even know it.
It works quite well. Well enough to keep using it as a getting-through-the-wall technique, certainly.
New ideas will present themselves. New perspectives become apparent.
I recommend it.
(Attention is like a flashlight in a dark room. One of those focusable flashlights. You can narrow the beam to a very bright spot. Make a very small place very clearly lit. But that also renders the rest of the room pitch black (how deep is that darkness? Do you know???). Sometimes the broader beam is called for. Sometimes it's useful to lose control of the light entirely.)