How do i change the parent of a model?

I'm trying to make an enemy model spawn in front of a door with a script but it doesn't work. I put it in ReplicatedStorage and tried making a lot of different scripts to see if it would work but it didn't.

I'll just put this as an example of what I mean more clearly. So the game Piggy has the piggy spawning in front of a door after 30 seconds. And I'm trying to do the same thing.

Script inside model:

local clone = script.Parent:Clone()
clone.Parent = game.Workspace