The Licorice Fence is an indestructible fixed blocker that actually fits in the spaces between where candies might appear.
What's special about it?
The Licorice Fence is so tough and sticky that it can block the effects of Special Candies, like the Striped Candy, the Wrapped Candy, or the Striped/Wrapped combo.
How do I destroy it?
The Licorice Fence cannot be destroyed; if it sits between two candies, it will prevent them from being switched. It will also stop candies from falling below them if the Licorice Fence lies horizontally.