How do you pause a script without making it start over again?

little example on how you can stop and start a script without disabling it.

--// this creates a bool Value in the workspace so you can see it working, Just look for a Go Bool Value in your workspace!
local DoGo = (function()
	local D = workspace:FindFirstChild("Go")
	if(D == nil) then
		D = Instance.new("BoolValue",workspace)
		D.Name = "Go"
	end
	return D
end)()

-- Simple timers to show how long we're either running for or waiting for... These are not needed to do this. Its just a fancy way to show it working!.
-- Grab our starting tick via tick()
local StartTime = tick()
local WaitTime = tick()

-- main Loop
while true do
	if(DoGo.Value == true) then -- if our Go value is true then start everything
		local NowTime = math.floor(tick() - StartTime + 0.5)
		print("Woo!, We're been computing since [",NowTime,"] Secs!")
		WaitTime = tick()
	else -- our go value is false lets wait!...
		local MyWaitTime = math.floor(tick() - WaitTime +0.5)
		StartTime = tick()
		print("Waiting ", MyWaitTime , "Secs!")
	end
	wait()
end

hope this helps! :)