Tank zombie(whee23pvz)

tank zombie rolls to the third column and then stops. every few seconds, it shoots a bullet at the plant in the lane farthest from him. after a certain amount of time, or, for any reason, there are no plants(or only low plants) in the lane, the tank zombie will start rolling forwards. if you put a spike weed or spike rock in front of the tank zombie, it will be destroyed. you can also put a spike weed or spike rock directly under it when it stops in the third column.