Limiting a Max Rotation?

I want to limited this needle gauge to its Normal State What can i do to achieve this?

while wait do
	wait(0.1)
	script.Parent.Rotation = script.Parent.Rotation +0.9
	if script.Parent.Rotation == 55 then do
	script.Parent.Rotation = script.Parent.Rotation -0
end
end
end

Default State: https://gyazo.com/5217a35852b5b468d073759ce5898878

Normal State: https://gyazo.com/a8bb479a139437159c51c2c2a63a4d5a

while true do
	wait(0.1)
	if script.Parent.Rotation <= 55 then do
		script.Parent.Rotation = script.Parent.Rotation +0.9
	else
		-- Do what ever it would do once it hits its normal state. 
	end 
end