i set up a tycoon from a starter kit but misses some files, how do i make them?

as i said in the title i made a tycoon with a starter kit but it's incomplete. i found it in the free models, but it is reposted and the original author is bigbadke12/ but i can't find his tycoon anywhere. i found his name in some of the scripts. so my question is how do i make these scripts, the scripts that are missing are: a script thats named leaderstats and a script that's named tycoon gui. this is the link to the model i found (wich is not of the original author): https://www.roblox.com/Tycoon-Starter-item?id=83717938 if anyone can help me please do and thanks if you do so!