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I have written the following peice of text. Let me know in case I have made mistakes.

I can clearly remember (a/one) freezing night. I was looking at the clock , coz I knew a few ours (were/ had been) left (to/till) the crack of dawn.The howlings of (the) wolves could be heard (from/within) the heart of the mountain. Once I opened the door, the (cries/howlings) of blizzard had me close it again. I cleaned the steam off the the only window of our small room, but I couldn't see anything (through/in) the darkness except for a (feeble/ faint/dim) stream of light (flickering / twinkiling /glittering / shimmering) from the distant.

Thanks in advance.

Comments  
Here`s what I think you should correct:

I can clearly remember one freezing night. I was staring at the clock (if you look at something, you don`t do it for hours), coz I knew there were a few hours left till the break of dawn (crack is rather used for the action itself and the sound).The howling of the wolves could be heard from the heart of the mountain. Once I opened the door, the wailing of the blizzard had me close it again. I cleaned the steam off the only window of our small room, but I couldn't see anything in the darkness except a feeble/dim stream of light flickering in the distance.
Thanks for the answer, but only a native speaker can resolve my doubts.