Two red dots

Yes two red dots

The sentence you provided seems to be grammatically correct. However, you might consider modifying it slightly for clarity and flow. Here are a few suggestions:

"The fire I lit had been extinguished and the room was now completely dark. As I stepped into the room, I saw two red dots blinking in the corner."

"The room was completely dark, the fire I had lit now extinguished. As I entered, two red dots caught my eye, blinking in the corner."

I hope these suggestions are helpful! Let me know if you have any other questions.

Humble has done it

Humble has it👌🏾... But, for clarity sake, and flow of thoughts, I'll stick with the first sentence in Humble's suggestions.

"The fire I lit had been extinguished and the room was now completely dark. As I stepped into the room, I saw two red dots blinking in the corner."

If room was completely dark, then how I saw anything?

I'm assuming the fire has been lit somewhere outside the room and it was the source for lighting that room. It yes, then I would say:

The fire I lit had extinguished and the room has gone completely dark. But as I stepped inside the room, I saw two red dots blinking in a corner.

Alternatively, if the fire was inside the room

The fire I lit in the room had extinguished and it has gone completely dark. But as I stepped inside, I saw two red dots blinking in a corner.

"The fire I had lit was completely extinguished and the room was now completely dark." The action of lighting a fire came before it was extinguished.

The sentence is grammatically correct, but it can be modified for clarity. A possible modification is: "As I stepped into the room, which was completely dark as the fire I had lit had been extinguished, I noticed two red dots blinking in the corner of the room."

"The fire I lit, was subsumed by the darkness, as I went int th room, I saw the two res dots gleaming in th corner"

When I entered the room ,
, I found it engulfed in darkness . The fire that was lit; now extinguished . Despite the pervasive darkness , I
noticed two red dots blinking in the corner of the room .

The fire I had lit was extinguished leaving the room in a complete darkness. Stepping inside, I saw a gleam of red dots blinking at the corner of the room.

This sounds more wattpadish.