Going to the settings app on your iPhone, find “Sounds” listed on the menu listing. Clicking on that, it gives you choices of “Vibrate on Ring”, “Vibrate on Silent”, a volume button, and the different actions that require a notification sound/vibration. To change a vibration pattern, click on one off the alerts, such as Ringtone.
On the resulting page, it lists all of the ringtones, both the native ones that came with iOS 6, as well as any that you have purchased or created. Below that list is all of the Alert Tones that are native, purchased, or created. On top of both of these lists is the selected Vibration. To change it, tap the name on the right side.
This gives you a list of all the vibrations that were included with iOS 6. There’s quite a few of them. They allow you to customize your alerts just the way you do with the audio ringtones. I get emails all the time, so I don’t want that vibration to be something very involved. I chose Quick for that. There’s an S.O.S. vibration on there for those situations where someone might be notifying you for help, or offering you the help that you need. There are several to choose from, but suppose none of these fit your needs? Click on the last option on the bottom, Create New Vibration.