how to change player speed in roblox studio code example

Example: How to make a walk slow script in roblox studio 2020

speed = 12 --Defualt Speed is "16"

function onPlayerRespawned(character)
	wait(1) --Lodaing Delay
	local player = game.Players:GetPlayerFromCharacter(character)
	local human = character:findFirstChild("Humanoid")
	if player ~= nil and human ~= nil then
		human.WalkSpeed = speed
	end
end

game.Workspace.ChildAdded:connect(onPlayerRespawned)

--A Script By Rigby#9052 on Discord