Hey, back with some practice - getting the offset of the mountain node to loop can be tricky so I tried to achieve a similar effect with periodic noise. Attached a hurried walkthrough, too, enjoy...
Note: If you want to limit your noise to X, Y or Z or when using 1D noise, you can try appending a float to vector node before the first add node, plug Time into your desired axis, and append another float to vector node before the second add node. Here is a screenshot: https://drive.google.com/file/d/1EXLv...