Adding fire to character HEAD?

Okay I am making a game that includes this feature that you can select a gui onClick and you would recieve a fire on your head so like

local fire = instance.new("Fire")
game.Workspace.findFirstChild:connect
localplayer.head.fire

I have 0 clue..?

local Button = script.Parent
local player = game.Players.LocalPlayer
local character = player.Character

function onClick() 
		Instance.new("Fire",character.Head)
		character.Head.Fire.Size = 5
		character.Head.Fire.Heat = 5

end 

Button.MouseButton1Click:connect(onClick)

Size and Heat is optional, you can delete it if you want, its just if you want to modify size and heat ;)