Mood:
Grammatical: Refers to the verbs and the speakers attitude.
Literary: Indicates the prevailing atmosphere or emotional aura of a work.

Examples:
Grammatical: "Shut that door!"
Literary: "A sudden emptiness seemed to flow now from the windows and the great doors, endowing with complete isolation the figure of the host, who stood on the porch, his hand up in a formal gesture of farewell." 

-The Great Gatsby

Explanation:
Grammatical: The demanding force behind that sentence shoes the imperative and crucial mood of the speaker. The purpose of this is to show the speaker is serious and down to business, no playing around.
Literary: In this quote Fitzgerald describes Gatsby as being alone. This sets the atmosphere and setting as isolated, which are two factors that set the mood. Fitzgerald uses the mood to show Gatsby's loneliness and how lowers his spirits. This mood helps the reader characterize Gatsby as a man who doesn't like to be alone.