How could I make a combat system like arm wrestling simulator?

I am trying to make a game like arm wrestling simulator but it will be called beat up simulator. I got stuck when trying to make the combat system like in arm wrestling simulator. I just cannot figure out how it works I have thought about a health system but that doesn’t work like arm wrestling simulator and yes I am going to add my own twist to it!

this is my fighting script - Gobal

script.Parent.StartFight.Event:Connect(function(plr, CharacterToFight)
	game.ReplicatedStorage.StartFight:FireClient(plr, CharacterToFight)
end)

local PlayerS = 1000
local AIS = 1000

script.Parent.RemoteEvent.OnServerEvent:Connect(function(plr)
	PlayerS = tonumber(game.leaderstats.Leg.Value) + PlayerS
	
	
end)

I kinda got stuck here and thankyou for your time!