The DEMO version only includes 4 pages:
http://smpn16gresik.sch.id
http://smpn16gresik.sch.id/pages/main/pages-6054156d4c495/profil-sekolah.html
http://smpn16gresik.sch.id/pages/main/pages-60f0f88704d6f/program-unggulan-sekolah.html
http://smpn16gresik.sch.id/pages/main/pages-66ee474b4073f/denah-sekolah.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
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