The icon made in this tutorial has been uploaded. Give it a gander:

Mmmm purple. Just to make a note here, I usually like to only move the stripes over by one pixel per movement, while the tutorial shows a movement of two pixels. This change was due to space and me wanting to to look all pretty.
This effect can be used in icons, avatars, stamps, whatever your little heart desires.
In the making of this tutorial, I used
this tutorial, by `
b0r3d13.
More Resources ->
[link]
the stripes are incomplete? which part are you erasing? Changing the size of your image depends on which program you are using, I would check in your help files for Canvas Size, or something similar.
You don't need to be able to see the overhanging stripes to do this, I only show them here so that it is easier to understand.
Anyway, on the erasing I'm erasing the overhang on either side. I tried once erasing on the right side.. the direction the stripes were moving to. Then the next try I erased the overhang on the left. I wasn't sure really where I was supposed to be erasing. I re-read the tutorial a few times but I still think I'm missing it. Some things go over my head. =\