oral competition

Today I got select to join some oral competition for the school, is an inter school thing. I dun even know how I actually join it, I was told before hand and I could have run away. Too late for regret now so might as well do it, but is it possible to come out with a five min script in one day? I got to do it on this Thursday. sigh still got a performance on this Monday to worry. I know I keep complaining how bored I was with my life and god threw these at me.(no offense god)