How come my Scrolling-Text code is not scrolling/entering strings correctly?

What is the problem?

The problem is that it is not scrolling a specific piece of Text (a sequence of a String), but instead keeps doing something else than what it is supposed to do, and sometimes skips a line; However, I have indicated where the problem is.

Was there any Output?

Sadly, I can not provide any, as it is not giving any errors, however, I have added print functions for specific parts of the code, but they are not printing correctly either (it's not doing specific lines that the code is supposed to do, and sometimes skips a line).

What is the code? Can you provide it?

Yes, I can provide the code, however, it is very confusing, and I have done a lot of changes to try and get it to work finally, but all attempts resulted in the same thing. Here is the code:

local sl = {1}; local ll = {};
local msg = "I'm|a|string!|:D"

for q = 1, #msg do
	if msg:sub(q,q) == "|" then
		table.insert(sl,q + 1)
		table.insert(ll,q - 1)
	end
end

if #sl == 0 then
	table.insert(sl,msg)
else
	for x = 1, #sl do
		if sl[x] and ll[x] then
			print(sl[x],ll[x],msg:sub(sl[x],ll[x]))
		elseif sl[x] and not ll[x] then
			print(sl[x],msg:sub(sl[x]))
		end
	end
end

print("Start Scroll")
for x = 1, #sl do --The problem is in this chunk somewhere I'm guessing
	local CurMes = sl[x] and ll[x] and msg:sub(sl[x],ll[x]) or sl[x] and msg:sub(sl[x])
	for k = 1, #CurMes do
		if sl[x] and ll[x] and CurMes:sub(sl[x],ll[x]) ~= "" then
			print(CurMes:sub(1,k))
		elseif sl[x] and CurMes:sub(sl[x]) ~= "" then
			print(CurMes:sub(1,k))
		end
		wait(1/25)
	end
	wait(2.5)
end
print("Finished scroll")