Just press SPACE to switch slides. Lol sorry that it takes long.
I did it with the code I used to make one of my previous project, here is the link -----> https://scratch.mit.edu/projects/406709555 Like and favorite the project if you guys want to get a part 4 (Not forcing you guys, just saying IF you want a part 4, you would have to do that). If we get to 8 likes, a part 4 will be made soon for you guys!