This is quite an easy effect to create and simply requires an image within a frame. You need to set the frame overflow to hidden then, setting a scroll transform on the image have it start -500 to 500 that will create the effect of the image moving. The image is ideally larger then the frame its in so when the user scrolls more of the hidden image gets revealed.

You can then mess around with how much the image moves during the scroll. You could also add a transition effect and thats another whole thing you could play with. I find you dont really need a transition effect and it looks great. Adding a small smooth scroll could make it better but thats mostly up to personal preference.