Hush - how the author use imagery & tone to set a mood ?

There many ways that an author can set a mood & tone & imagery to set a story . One of my friends she had to move because her friends at her school . They kept harassing her about  something she did that everybody in the school could not stop talking about so what she was that she and her parents decided to move from one school to another near the new area that they lives in . This girl would come hysterically crying because everybody was calling her names and making faces at her so me as a good friend would let her cry on my shoulder and she would just pour out crying her eyes looked like a  open faucet  just pouring water  and i would feel really bad for her i would try to make her feel happy by telling her jokes and try to make her forget about all of the problems but i always told her you only live once and you should make the best of it so she can live a normal life but she was determined and decided to move .