Nesting 'if'

Maybe if I knew which script launguage ninox uses I'd have better luck with Google.

I think I want to nest an if

Following on from my previous

if 'Year Code'.Year < 1996 and 'Film Location' = 2 then
'Year Code'.'Year Code' + 'Month Code'.'Month Code' + Day + 'Day Sequence'

else
if 'Year Code'.Year < 1996
'Year Code'.'Year Code' + "-" + Folder.Book + "-" + Page

else
'Year Code'.'Year Code' + 'Month Code'.'Month Code' + Day + 'Day Sequence'
end
end

I want to add a leading zero to the 'Page' so I get AB-C-01 not AB-C-1

The formula editor just tells me I'm wrong when trying

if 'Year Code'.Year < 1996 and 'Film Location' = 2 then
'Year Code'.'Year Code' + 'Month Code'.'Month Code' + Day + 'Day Sequence'

else
if 'Year Code'.Year < 1996 and Page <= 9 then
'Year Code'.'Year Code' + "-" + Folder.Book + "-" + "0" + Page
else
'Year Code'.'Year Code' + "-" + Folder.Book + "-" + Page
else
'Year Code'.'Year Code' + 'Month Code'.'Month Code' + Day + 'Day Sequence'
end
end
end

How do I nest my ifs!