Multi-slide projectors placed in racks (at least 2 pointing to each screen) ..."programmed" to dissolve/advance in synch with sound track using such devices:
And later on DOS.
Then Macromedia Authorware (which wasn't much different than scratch)--but it had multimedia drivers to control laserdisk and later digital video and CDROM etc.
That was sort of eaten by Macromind/Macromedia Director (language was "Lingo").
Then Flash/ActionScript 1, 2, 3 (which was like Java)
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