Use the scrolling that you have, but edit the sprites that scroll to have black platforms on them. Just take the current scrolling sprites and put black platforms on them!
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Replace the scrolling scripts with this:
[blocks]
<when green flag clicked>
<forever>
<set x to( (( (((( sprite number <*> 480 ) <+> <{ scrollx }> ))) <mod> number of sprites ))
<end>
[/blocks]
Sprite number is which sprite it is (i.e. the first ground section would be 1) and the number of sprites is how many ground sprites there are (if there are five ground sections, the number would obviously 5)
You'll find the mod block in operators. Pick the last block and use the drop down menu and select mod. (mod stands for modular function, but that doesn't really matter)
Does that work?
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No, greenflash.
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some of mine, from newest to oldest...
http://scratch.mit.edu/projects/Locomule/798042
http://scratch.mit.edu/projects/Locomule/792220
http://scratch.mit.edu/projects/Locomule/742929
http://scratch.mit.edu/projects/Locomule/708768
http://scratch.mit.edu/projects/Locomule/707613
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