Hi, Im @Malibubeach360 I really stuck on the scripts for how to make really cool intros like
this one:https://scratch.mit.edu/projects/439817219 but I have no idea pls help thx

Just use several graphic effects in an order. The one linked uses rotate, stretch, stretch, rotate, shake.

For most of the above mentioned effects the smoothest way to apply them is using pen.

Here are some tips:

Use Clones
You want to compact an entire intro into 1 sprite so defining clones like so is key.

repeat (5)//however many costumes you have
next costume
create clone of [myself v]
end
when I start as a clone
if <(costume #) = [2]> then
Do This
end
if <(costume #) = [2]> then
Do This
end

Or

repeat (5)//however many costumes you have
change [clone # v] by (1)//make sure this variable is 'for this sprite only'
create clone of [myself v]
end
when I start as a clone
if <(clone #) = [2]> then
Do This
end
if <(clone #) = [2]> then
Do This
end

Tell me if you need more help

Here are the steps for making a cool intro:

Choose your color. You need to choose a main color of what your intro is.

Add your picture. Something that is basically needed, is adding your profile picture in your intro.

Then you make stuff like: bombs exploding, money falling, spotlights on your picture, or anything that looks cool.

Next make your username appear and move around or something.

Also, your intro doesn't have to be super awesome. I think that as long as you have an intro, that good enough.

@The_Imaginarium what would the costumes be of?

I cant seem to find the red block also?

Costumes could be your name, profile picture, the background, and other visual elements, perhaps simple shapes, to make your intro look better.
The red block is when you type something in the forum blocks which it doesn't recognize.
Like so:
it recognizes the:

go to front

block, because that's a real block.
but blocks it doesn't recognize are red, like so:

hi

because that's not a real block