HealthBarGui

--HealthBarScript

local player = game.Players.LocalPlayer
local character = player.character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")

humanoid.HealthChanged:Connect(function(Damage)
	script.Parent.Size = UDim2.new(Damage / humanoid.MaxHealth, 0,1,0)
end)

--KillBrick

script.Parent.Touched:Connect(function(hit)
	if hit and hit.Parent:FindFirstChild("Humanoid") then
		hit.Parent.Humanoid.Health = hit.Parent.Humanoid.Health - 10
	end
end)