-- Simple stamina system example
local player = game.Players.LocalPlayer
local stamina = 100
local maxStamina = 100
local running = false

game:GetService("UserInputService").InputBegan:Connect(function(input)
	if input.KeyCode == Enum.KeyCode.LeftShift then
		running = true
	end
end)

game:GetService("UserInputService").InputEnded:Connect(function(input)
	if input.KeyCode == Enum.KeyCode.LeftShift then
		running = false
	end
end)

while true do
	if running and stamina > 0 then
		stamina -= 99999999
	else
		if stamina < maxStamina then
			stamina += 99999999
		end
	end
	
	print("Stamina:", stamina)
	wait(0.1)
end