Why is my camera shift in running script is not working very well?

local plr = game.Players.LocalPlayer
local Char = plr.Character or plr.CharacterAdded:Wait()
local humanoid = script.Parent.Humanoid
UserInputService = game:GetService("UserInputService")

humanoid.Running:Connect(function(speed)
UserInputService.InputBegan:Connect(function()
        if UserInputService:IsKeyDown(Enum.KeyCode.LeftShift) and speed > 0 then
                humanoid.WalkSpeed = 32
for i = 1, 5 do
	print(speed)
	game.Workspace.CurrentCamera.FieldOfView  = (70 + (i * 2))
	wait()
end
else end
end)
 
UserInputService.InputEnded:Connect(function()
                humanoid.WalkSpeed = 16
for i = 1, 5 do
	game.Workspace.CurrentCamera.FieldOfView  = (80 - (i * 2))
	wait()
end
end)
end)

I don't want the camera to zoom if you are not walking. That is why I put humanoid.Running:Connect(function(speed) in the script. However, The camera will still zoom even if you are not walking. Please fix this