Area 64 Codes
(something like this:)
OOOOO O O OOOOO && <--Gate
Then open it and immediately close it again. You can edit it now
and make it huge and you'll only be charged for the first, small
ride. One disadvantage: You will not win the "Biggest, tallest
etc." ride of the year come awards time. Depending on how long you
want to run your park, it may be better NOT to do this.