不知不觉天又慢慢变黑翻译成英文怎么写

不知不觉天又慢慢变黑.
Unconsciously the sky gradually getting dark again.

unconsciously,It is getting dark.

The sky is slowly getting dark unconsciously again.

The day reached black slowly by insensible.

the sky turns to be dark unconsciously

Black also slowly unwittingly days