okay, i made an edited version of your poem. hope this helps!
The pleasant scent of warm, white gravy and fresh, fluffy biscuits filling the air.
The pale green bathtub awaiting for sultry water to trickle down it's pipes.
The bathroom window letting in warm, bright, rays of sunlight.
The birds sitting in the beautiful, hot pink crepe myrtle tree, singing their melodious morning songs.
Oh, how I yearn to have these precious moments in my grasp once again.
what and why did i change things?
sultry: warm, hot, and/or humid
melodious: having a pleasant melody
yearn: intense feeling of longing, or intense feeling of wanting and wishing of something
i used more descriptive words so you can feel like you're there more.
unique words help your poem feel more original.
i changed "fills" to "filling" because, for example: it says "The bathroom window letting..." instead of "The bathroom window lets...". you want it to be consistent.
hope this helps :)