With autoscroll
I checked again, example site is 7.0 version, it looks like that is features by default, I don't know code to achieve this
However you can consider using Gallery Slideshow for mobile, then enable Autoscroll feature.
We can give you add 3 text links over Gallery Slideshow + make slideshow appears on mobile only
What do you think?
Text uses h3, so the code should be
@media screen and (max-width:767px) {
.portfolio-text {
opacity: 1 !important;
}
.portfolio-text h3 {
color:#E9F3F2 !important;
}
}