Scratch

Yes please show me I'll just have it go on for a super long time it doesn't really matter.

Thank you the random thing worked I'll look at the wiki page.

Sorry what I mean is i want the stage to scroll across the screen and have a random costume appear at the end of it and i want that as a loop or for a really long time. Imaginelt could you show me what you were talking about please.

If it can scroll back, you'll need a list.

when gf clicked
set [scrollx v] to [0]
delete (all v) of [terr v]
repeat (10) //How long you want it to be.
 add (pick random (1) to (5)) to [terr v]
end
add (item (1 v) of [terr v]) to [terr v]
forever
 clear
 set [counter v] to [1]
 switch to costume (item (counter) of [terr v])
 go to x: ((scrollx) + ((480) * ((counter) - (1)))) y: (0)
 stamp
 change [counter v] by (1)
 ^^ repeat the above 4 blocks 10 times, so that they are played 11 times ^^
 if <key [right arrow v] pressed?>
  change [scrollx v] by (-1)
 end
 if <key [left arrow v] pressed?>
  change [scrollx v] by (1)
 end
 if <(scrollx) < ((-480) * (10))>
  set [scrollx v] to [-1]
 end
 if <(scrollx) > [-1]>
  set [scrollx v] to (((-480) * (10)) + (1))
 end
end

Ep1cMarshmallow wrote:

BirdByte wrote:

If it can scroll back, you'll need a list.

when gf clicked
set [scrollx v] to [0]
delete (all v) of [terr v]
repeat (10) //How long you want it to be.
 add (pick random (1) to (5)) to [terr v]
end
add (item (1 v) of [terr v]) to [terr v]
forever
 clear
 set [counter v] to [1]
 switch to costume (item (counter) of [terr v])
 go to x: ((scrollx) + ((480) * ((counter) - (1)))) y: (0)
 stamp
 change [counter v] by (1)
 ^^ repeat the above 4 blocks 10 times, so that they are played 11 times ^^
 if <key [right arrow v] pressed?>
  change [scrollx v] by (-1)
 end
 if <key [left arrow v] pressed?>
  change [scrollx v] by (1)
 end
 if <(scrollx) < ((-480) * (10))>
  set [scrollx v] to [-1]
 end
 if <(scrollx) > [-1]>
  set [scrollx v] to (((-480) * (10)) + (1))
 end
end

I'm realy sorry but I'm new to this and none of that makes any sense to me. Could you please explain how it works? Also i tried to make a script like that but i couldn't find the dark orange blocks. Also is there a simpler way of doing that? Thanks.

A longer script might be easier for you to understand. Compressing scripts make them more complicated. It took me a while to get it too, so don't worry.
The dark orange blocks are list blocks -- same place as variables, just click "create new list." 
If you're wondering why I used 480 in that so much, the reason is that it is the width of the scratch screen -- and your scrolling sprites.
It's hard to explain, so just think about it; eventually it'll flood in, and you will be enlightened. 

Ep1cMarshmallow wrote:

Sorry BirdByte but i tried that and it worked but i want the stage to scroll not the sprite. Like the game Run Stick Run for i phone my sprite other than jumping stays in the same place the whole time. i want the background to scroll and pick a random background at the end of each one. I guess  I'm not being specific enough.

I know. You need a separate sprite for the terrain.

Ep1cMarshmallow wrote:

I'm sorry for wasting your time but i really don't get it. So your saying i need to make a new sprite? Really sorry for being so slow at all this, i made my account and downloaded scratch yesterday. I think i just need more help processing how this all works. DX

I admire your eagerness, but maybe making a platformer isn't the best way to get started with Scratch... maybe try making a non-scrolling platformer or a Pacman remake?

Anyway, you know what a sprite is, right? For basic info like this I usually refer people to the wiki -- here. Make a new sprite and load your 5 terrains into the costumes, and use my earlier script in that sprite. 

Ep1cMarshmallow wrote:

Oh so your saying that my Backgrounds are just sprites? Ok now I understand better.And this isn't my first project/ i have one called th marshmallow chronicles but it's on my schools account. So do i need to make a sprite named anything and if so how do i name it. And thank you for being so patient with me.

It doesn't matter what it's name is. You can change the sprite name in the panel above where you put the scripts.

Oh, and no problem! ^_^ Programmers are usually very patient people. XD

Ep1cMarshmallow wrote:

Ok working on the "backgrounds". How do i get my main sprite to show ontop of the other one.

Just use this block:

go to front

Ep1cMarshmallow wrote:

Thanks and now i copy that huge script into my background sprite right?

Right. 

Ep1cMarshmallow wrote:

Well there still seems to be something wrong so i uploaded it. Can you look at it  and tell me what you think is wrong with it?

Sure. Can you link me to it? I can't see it on your user page.

BirdByte wrote:

Ep1cMarshmallow wrote:

Well there still seems to be something wrong so i uploaded it. Can you look at it  and tell me what you think is wrong with it?

Sure. Can you link me to it? I can't see it on your user page.

nvm, found it.
You want to make sure that your terrains have transparent backgrounds -- that's the checkered gray -- so that they don't overlap. Zoom out using the zoom selection next to the color selector and grow your sprites until it fits the painting area using the buttons on the top left of the paint editor.    You'll need to add sensing as well, but I'm not good at explaining that at all, so you'll need to ask somebody else.