"TileExtra" is a way of showing which tiles had any behavior associated with them. The only time this array is used is to control when weeds grow back. "T" is a timer for the tile's state. However this array won't exist in the next version.
Thank you. I presume then that the "TileExtra" array would change when the weeds are dug up and the ground is hoed so that the weeds won't grow back. I will try that another day to confirm it.
