One day I was wondering “If a ”Repeat until I receive <message>“ block was made then this would be easier to program. But then I thought ”WHAT IF IT WAS REAL ?!?!?!?!" So I made this. Maybe its possible with custom blocks. Let me try.

define Repeat until I receive
forever

That didn't work . If the Scratch team made it in 3.0 maybe it can work!!!!! If you guys figure it out reply to me so Scratch can be a better place!!!
Lets try again!

define repeat until I receive (message)
repeat until I recive(message)
INPUT
end

Looks Invalid.

You could easily do this workaround:

when I receive [somethin' v]
set [received v] to [1]

// remember to set "received" to 0 when the green flag is clicked

with

repeat until <(received) = [1]>
... :: grey
end

With custom blocks, I'm sure you can find something ^^

Its a way that works but I do want to see if we can do it in a different more simple way with custom blocks ect.
Good effort though!

Make A Block Called ‘Repeat Until’ And Make A Number Input And Call It ‘ Message’. Make Variable Called Message. Forever Set The Number Input Message To The Variable. When Flag Is Clicked Repeat Until Variable=100 Wait 0.1 Seconds Change Variable Message By 1.
Define Block ‘Message’ Wait Until Number Input ‘Message’ =100 Broadcast ‘Your Input’

Good job!

I Don't 100% Know If It Works Because I Haven't Tried It.

I TRIED IT!

Does It Work?

Yup.