The First time I put in the composition idea with this info and I received the above images:

i am a watercolor artist who is planning to paint some Winter Holiday Cards. These are inspired by nature, something simplistic, a red bird at nighttime on a wooden post. It is snow landscape with rolling hills and there are stars in the sky with a moon. Generate something for me.

 

The second time I added your suggestion “ Using pastel background” and I received the below generated images.