Deroldo

I'm trying to create a functionality similar to the example in this CodePen, but I need it to do the following: 1. When it reaches a specific section, it should add a pin to that section. 2. For each scroll within this pinned section, it should first change the text, then display an image gallery. 3. With each scroll, it should switch to a new image in the gallery until it reaches the last one. 4. When it reaches the end of the gallery, it should transition to the next section, and then remove the pin, just like in the example video below. In the codepen example, it scroll horizontally, i want to make something like this but vertically. Sorry por the bad quality of video, but the upload only allows 1mb of file size. c84a6fc5-0668-490f-a389-05d81c75520e.mp4