Click the green flag. The output would be either "Hello World" with animation or in a random language. I was planning on doing one for making the sprite "draw" the text, but that's kind of complicated. I'll save that for next time.
It's a school project, which means that it is a project I needed to submit for an assignment. Also, I think this is a duplicate assignment from last year, hopefully I won't put school projects on Scratch again (I remember at school I was starting to learn Python but IDK)