How fix the walkspeed of the character?

So I was making a luck based game, y'know, the norm, then i am trying to make the walkspeed 16 again, but the computer doesn't know what the humanoid is (and i know why) if that was a mouthful, you will see what i mean

local Hitable = false

script.Parent.Touched:Connect(function(hit)
	if Hitable == false then
		local humanoid = hit.Parent:findFirstChild("Humanoid")
		if humanoid~=nil then
			Hitable = true
			wait(.5)
			humanoid.WalkSpeed = 0
			local Number = math.random(1,2)
			print(Number)
			if Number == 1 then
				humanoid.Health = 0
			end
		end 
	end 
end)