How to run tasks sequentially in Gulp.js?

Question

Web development

Hello! When I first started using Gulp.js, somewhere while reading articles and docs, suggestions flashed about the problems of running tasks asynchronously. And then the day came when I faced this problem.
I have 4 tasks to minify four html css js and img folders. Each task individually normally fulfills and performs its task. With asynchronous launch, of course, everything crashes. Moreover, the work of tasks does not overlap in any way, they work with different files.

My attempts to solve the problem:

1. A wonderful article on the front-end, which contained code with incorrect task syntax.
   So this solution didn't work.
   
2. Topics on Stackoverflow about different ways of launching by linking tasks, using callbacks, and so on. So this solution didn't work.
   
3. Great run-sequence plugin. So I couldn't run it.
   

In general, it looks like I have some kind of crooked task. Help, good people.
I won’t throw everything off, I’ll just show the structure (as it is now and works separately).

Answer 1

I use the plugin https://github.com/teambition/gulp-sequence
Gulp 4 has this feature out of the box:

gulp.task("sequence", gulp.series(
    "firstTask",
    gulp.parallel("taskA", "taskB"),
    "secondTask",
    "thirdTask",
    function fourthTask() {
       // do stuff
    }
));

Answer 2

Attach the entire galpfile if you want help.