This is a Mega Scroller, using the 4-bits hardscroll technique created by Alien/ST Connexion, but in just four kilobyte.
Yes, you read correctly: fullscreen, sync-scroll, parallaxed background, huge font and obsessing music, all of this in less than 4 Kb of code !
This screen was released during the SillyVenture demoparty that took place in Gdansk (Poland) on December 9th 2017.
(For more information, you will find explanations about the 4-bit sync-scrolling on the Atari ST Fullscreen demos history page)
It won the 4 KB intro competition of SillyVenture 2017, as its only entry, the same weekend as my four bytetros in the 128-byte competition, won by the 128B Mandelbrot Set.
The idea came from the hidden screen by The Black Cats in the Vodka Demo by Equinox, “with its nice and polished font”, as the README says. The technique comes from Alien of ST Connexion, who used it first in Let’s Do The Twist Again and explained it in detail in ST Magazine 55, in October 1991.
To fit in 4 KB, the program is compressed with Shrinkler, the packer by Blueberry of Loonies. The background pattern is by Skywalker of Exo7 and the music by Tao of Cream. It runs on a 520 STF, and on STE, where it uses the hardware scroll register instead, with a black border on the left of the screen.
Download
More about it