In order to view the sprites' actions, you will need to click the green flag. Once you click the green flag, you will see the sprite say "Hello World"! If you would like to stop the sprite from saying "Hello World" after you already clicked the green flag, then you should click the red button that is next to the green flag.
When Mrs.Huang showed the class how you can make your sprite move as it is saying "Hello World", I thought about doing that in my version of "Hello World". After making some adjustments in my project, I felt like I did a good job. Thank you Mrs. Huang.