House on mango street book. write a description of a scene using language that engages the senses. set the mood in your introduction and carefully select words that depict the scene to establish the tone of your piece. visualize the image as you write to assist in your word choice.

First, pick a feeling. This could be as vague and easy as anger~sadness~excitement~fear, or as nuanced as contentment... etc. 
Then go through your senses and find words and concepts that remind you of that feeling. ie, Anger:
-FEEL the beating heart and heat in face and blood, the sweaty palms
-HEAR a ringing in your ears, or a shout you make
-SEE your vision become tunnely and closed off, or your face go read
-TASTE metallic in your mouth, or blood, or a food that reminds you of a time you were angry

etcetera. 
Now, think of words that'll describe those senses. A beating heart is POUNDING and DEAFENING... 

The feeling is your MOOD, establish this first ("I was angry"). Then use the descriptive WORDS to describe the SENSES.