Creating a scrolling timeline in Adobe Premiere Pro involves a few steps. First, you need to import your media files into the program. You can do this by clicking on "File" in the top menu, then "Import", and selecting the files you want to use. Once your files are imported, you can drag them onto the timeline at the bottom of the screen.

To create a scrolling effect, you need to animate the position of your clips. Click on the clip you want to animate, go to the "Effect Controls" panel, and click on the stopwatch icon next to "Position". This will create a keyframe. Move the playhead to where you want the animation to end, and change the position value. Premiere Pro will automatically create a smooth scrolling animation between the two keyframes. You can adjust the speed and direction of the scroll by changing the position values and the distance between the keyframes.