Stamina decreases and increases at the same time

Help and Feedback Scripting Support
1

My stamina script is supposed to decrease if someone is running over the speed of 4, and increase when someone is less than the running speed of 4. But instead, the increase and decrease is running at the same time. How do I make it so it only runs separately?

local UIS = game:GetService('UserInputService')

local Bar = script.Parent:WaitForChild('Background'):WaitForChild('Bar')

local player = game.Players.LocalPlayer

local NormalWalkSpeed = 4
local NewWalkSpeed = 8 

local power = 10

local sprinting = false

repeat wait() until game.Players.LocalPlayer.Character

local character = player.Character

--= Functions =--

character.Humanoid.Running:Connect(function(speed)
	if power > 0 then
		while speed > 4 do
			if power > 0 then
				power = power - .03
				Bar:TweenSize(UDim2.new(power / 10, 0, 1, 0), 'Out', 'Quint', .1, true)
				Bar.BackgroundColor3 = Bar.BackgroundColor3:lerp(Color3.fromRGB(255, 42, 42), 0.001)
				print("decrease")
			end
			wait()
		end
		while speed <= 4 do
			if power < 10 then
				power = power + .03
				Bar.BackgroundColor3 = Bar.BackgroundColor3:lerp(Color3.fromRGB(255, 166, 11), 0.001)
				Bar:TweenSize(UDim2.new(power / 10, 0, 1, 0), 'Out', 'Quint', .1, true)
				print("gain")
			end
			wait()
		end
	else
		script.Parent.Parent["Run/Walk"].TextButton.Text = "Walking"
		character.Humanoid.WalkSpeed = 4
	end
end)
2

It is supposed to be running at the same time because i quickly read the code, and it seems like it is supposed to be locked on 4 though

3

how do I fix it when it is stuck on the while > 4 or <= 4 statement? Do you mean that?

4

Just higher the max value because it is supposed to be