Click for the next slide. Code for the thumbnail: make it a different sprite and put it on top of everything. Then, put this code: when the green flag is clicked hide. But before you click the green flag, save the project.
Note: If you want to edit it, make the thumbnail visible before saving the project. *For my School of Coding Students* The homework is inside the project, please try to finish and submit it by the time I upload the next lesson.