How do I break a sequence?

EDITED

Ok so lets say I have a sequence, like so:

local SequenceIsStopped = false
function Sequence()
	--Do stuff
	wait(1)
	--Do stuff
	wait(1)
end

And I wanted to stop the sequence mid-way, how would I go by doing so? The only other way that I know of is putting a conditional that breaks the sequence if SequenceIsStopped = true at the end of every single line. Is there a more effective way? Or is that the only way?

Note: This is what I was talking about when I said that the way I know of is using a conditional:

local SequenceIsStopped = false
function Sequence()
	if SequenceIsStopped then break end
	--Do stuff
	if SequenceIsStopped then break end
	wait(1)
	if SequenceIsStopped then break end
	--Do stuff
	wait(1)
end

I know it's terribly inefficient

for i = 1, 5 do
    print(i)
    wait(1)
	if Stop then
		break
	end
end

--The loop should stop if the variable Stop becomes true anywhere in the script.

How about this:

function CheckStopWork()
	if Stop then
		return break
	end
end

for i = 1, 5 do
	print(i)
	wait(1)
	CheckStopWork()
end

-- It should break the loop if "Stop" becomes true from somewhere else in the script.

I have no means of testing this, so I hope it works.