The sentence "The indigo bird shouted thirteen times" may be a proverb or idiom, usually used to describe someone or something shouting loudly, the sound is harsh, unpleasant, or too exaggerated.
This expression can sometimes be used to describe a certain emotion or state that is overly excited, out of control, or abnormal. It should be noted that this expression is a metaphor or figure of speech and should not be regarded as a true description or evaluation.