"create a combat tag system where if another player does damage to you, you cant heal, and 1/10th of the stats below are taken away if you leave while in combat. when in combat a skull will show up. last 1 minute without taking damage to exit combat. the stats are in a folder 1)lvl 2)str 3)spd 4)end"

-- script for combat system 
local Players = game:GetService("Players")
local skull = game.ServerStorage.Skull

local function onCharacterAdded(character)
    local humanoid = character:WaitForChild("Humanoid")
    local combatTag = Instance.new("BoolValue")
    combatTag.Name = "CombatTag"
    combatTag.Parent = character
    local skullClone = skull:Clone()
    skullClone.Parent = character.Head
    skullClone.Enabled = false

humanoid.Damaged:Connect(function()
        combatTag.Value = true
        skullClone.Enabled = true
        wait(60)
        if combatTag.Value then
            combatTag.Value = false
            skullClone.Enabled = false
        end
    end)
end

local function onPlayerAdded(player)
    player.CharacterAdded:Connect(onCharacterAdded)
    local stats = player:WaitForChild("Stats")
    player.Leaving:Connect(function()
        if player.Character.CombatTag.Value then
            stats.lvl.Value = stats.lvl.Value - stats.lvl.Value/10
            stats.str.Value = stats.str.Value - stats.str.Value/10
            stats.spd.Value = stats.spd.Value - stats.spd.Value/10
            stats.end.Value = stats.end.Value - stats.end.Value/10
        end
    end)
end

Players.PlayerAdded:Connect(onPlayerAdded)