How do games like void script builder create scripts from pastebin links?

How do I get text from pastebin and automatically put it in a script. I think its httpservice but im retarded so please help. Thanks

To run a server script from a pastebin url, you can use HttpService:GetAsync() and loadstring()

local url = "http://pastebin.com/raw/blabla"
local content = game:GetService("HttpService"):GetAsync(url, true)
local f,e = loadstring(content)
if f and not e then
	spawn(f)
else
	warn("Syntax error:",e)
end

However, in order to run a custom LocalScript at runtime, you can't use loadstring()

What Void SB does is they made an API which uses an alt account on roblox and makes it upload the LocalScript with the specified source as a model, which is then loaded via require() (or InsertService:LoadAssetVersion(), not sure, would have to ask tusk) and ran on the player.