I made this project a while ago, but if anyone still wants to know a technique for scrolling in many directions, take a look at this project.
http://scratch.mit.edu/projects/Zelda123/83506
Here is another very useful one by archmage
http://scratch.mit.edu/projects/archmage/64683
And Lucari621's project...
http://scratch.mit.edu/projects/Lucario621/87265
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