Use the scrolling bar to scroll up or down, don't move it to fast otherwise the project will crash.
Quite a while ago (On scratch 1.4) I just thought to my self: I should make something like those scrolling bars they have on Internet explorer or any other web browser and at that time I hadn't thought of doing it this way so I tried to make a scrolling bar with multiple costumes (I know, stupid!) and I did think of doing it this way but I didn't get how it would work, but when 2.0 came out I was so excited about all the new features that I completely forgot about making this project but just yesterday (Thursday 30th May 2013) I remembered an started work straight away, and now I've got my own little scrolling engine, and I've also figured out that if you want to fit in more frames for the scrolling you'll need to make the scroll bar bigger, otherwise you will never see them while testing your project out! _________________________________________________________ If you ever want to use this project but don't use the remix button just give me credit in your project notes, if you don't and I find it, be sure I WILL REPORT YOU! Also if you make a copy of this post a link to it in the comments! _______________________________________________________ It took me ages to actually think of the scripts to get this to work, even worse it took more even more time to find out all the scripts didn't work and fix them! But now I can go back to making editing or remixing other projects, I may update it at some point but right now I just hope you like it!