John stepped outside the house

[alpacinou]

Is this correct and natural?

John stepped outside the house and sat at a table on the patio. The indigo sky was bursting with stars and puffy clouds drifted lazily.

 

[Tarheel]

Yes, but I don't think you need the house.

 

[Charlie Bernstein]

And: Find that compound sentence, and give it a comma to call its own!