Theme OnePress Section Hero

Hello,
I use the WP theme OnePress. Via Customizer, in Section: Hero, I’ve uploaded two background images. One is my tree logo (which you can see when opening http://www.psycholoog-welzijn.nl), and the other is a picture of me. I would like these two to alternate: showing one for a few seconds, then showing the other, then back again. I can’t find how to do it in Hero Settings (section ID, padding top and bottom), Hero Background images (where Ive uploaded the two pictures), or Hero Content Layout (i don’t wish to add text to the images).

I’m really (no, REALLY) new to WordPress, so if you think you can help me, please explain it to me like you would to a four year old. Hope someone can help me.

Eline