Fire script that makes the player take damage from fire, doesn't work. Anyway I can fix this?

This is the third time I am asking this question and I apologize if this is a hassle for anyone, but It's a project that I need assistance on. So i've tried all suggestions but so far no difference has been made. The player lights up in flames, but they still take no damage what so ever. This is the script:

local firePart = script.Parent

local Players = game:GetService("Players");

firePart.Transparency = 1

local function LightOnFire(part)

local fire = part:FindFirstChild("Fire")

if not fire then

fire= Instance.new("Fire")

fire.Parent = part

local client = Players:GetPlayerFromCharacter(part.Parent)

if (client) then

local health = client.Character.Humanoid.Health

health = 100

health = health - 15

wait(3)

end

end

end

firePart.Touched:connect(LightOnFire)

Here a solution:

  local firePart = script.Parent

local Players = game.Players

firePart.Transparency = 1

function LightOnFire(hit)

local fire = hit.Parent:FindFirstChild("Fire")

if fire then

else

local FireInstance = Instance.new("Fire")

if hit.Parent:FindFirstChild("Humanoid") then

FireInstance.Parent = hit.Parent.HumanoidRootPart

local Humanoid = hit.Parent:FindFirstChild("Humanoid")

repeat

wait(3)

Humanoid.Health = Humanoid.Health -15

until Humanoid.Health <= 0

print("f")

end

end

end

firePart.Touched:Connect(LightOnFire)

Actually you didn't checked for the humanoid so it didn't found it probaly. This one should work. I tested it.

here is a solution

    script.Parent.Touched:Connect(function(hit)

if hit.Parent:FindFirstChild("Humanoid") then

hit:FindFirstChild("Fire"):Clone().Parent = hit.Parent

end

while true do

if hit.Parent:FindFirstChild("Fire") then

hit.Parent.Humanoid.Health = hit.Parent.Humanoid.Health - 15

wait(0.5)

end

end

end)