Scratch

I don't know if this is possible already or not?
But,a "When Loaded" would allow scripts to run without interaction
of the player.

For example:
Like an Easter egg.
You want to make Y move across the screen when a player clicks
Z,but, you use a seperate sprite.

It'd have to be hiding when the project loads, or the player would already see Y
in plain sight.

This would also be useful for a number of other things.

Like making see-through ghost.
Or an 8-bit monster.

Perhaps even a seizure gun?