Keep in mind that they will not read your speech, but listen, it should be natural. Follow the structure of public speaking, formulate sentences concisely and clearly, avoid piling up complex speech turns. Take your time, do not write a speech in an hour, identify a topic, and give yourself a few days to think about problems and questions, discuss the topic with your friends. The speech should inform, entertain, and encourage action. If you do not entertain, then you do not satisfy one of the main needs of the audience - to be happy.