If we can stop scripts, then we should have a block that can start other scripts.

start script [script 1 v] in [myself v]:: control

If you want to know more about adding names to scripts check out my proposal about adding names to scripts here.

Broadcasting

How exactly would this work?

I have approximately five problems with this concept:

1. If Sprite1 runs:

start script [script 1 v] in [Sprite2 v]::control

,
what should happen if Sprite2 has clones? Should only the original run “script 1”? Should the original and all of its clones do so?

2. I don't believe sprites should be able to control each other.

3. Communication between sprites is why we have broadcasts.

4. If analogous to the

stop [ v]

block, the start script block would specify three options, all of which I find weird:

start [all v]::control//does this mean all scripts (which includes custom blocks), or all green flag scripts?

start [this script v]::control//it is already running if it is calling this

start [other scripts in sprite v]::control//Hmm... if this sprite's “when key [space v] pressed” scripts will run, why not others'?

5. How would one title their scripts?
Scratch cannot do it for them because scripts in a sprite do not necessarily have an order.