Basic tips for writing a literary analysis

In Edgar Allan Poe's "The Tell-Tale Heart," the mad narrator explains in detail how he kills the old man, who screams as he dies. After being alerted by a neighbor, the police arrive, and the madman gives them a tour through the house, finally halting in the old man's bedroom, where he has buried the man beneath the floor planks under the bed. As he is talking, the narrator hears what he thinks is the old man's heart beating loudly, and he is driven to confess the murder.