On the second line, add some new information to twist the fact around into an idea that sounds negative or gloomy.
For the third line, begin with that negative-sounding idea and add information to twist it into a sentence that’s positive or cheerful.
Add a fourth line to this odd conversation by taking up an idea from the third line and twisting that thought from cheerful to gloomy.
Continue that way down the page, writing a dialog that is at odds with itself, swinging back and forth with each sentence from positive to negative.
Don’t worry about telling a coherent story. You don’t have to write things that are true. Just keep the attitude swinging from one extreme to the other.
Save a little room at the bottom to comment on what you have written.
Be sure to give your work a title and write the date on it.
Here is a longer version of these directions.