When I click on the left arrow. All the stickers go to left. But I imagined that, when I clicked on the left I should see the stickers hidden on the left side. So translate stickers to the right.
Haha, I wrote the code in the wrong way, was going to fix it, and then I thought about Mac OS X Lion's scroll inversion so I wasn't so sure I should fix it.
When I click on the left arrow. All the stickers go to left. But I imagined that, when I clicked on the left I should see the stickers hidden on the left side. So translate stickers to the right.