Can you successfully conduct a controlled burn? Version 1.0 Try this out. Please improve it! To reconfigure the grid (not really necessary to do this, but if you really want to do it, here are instructions). 1) Click on any tile. 2) Press either W,A,S,Z to move the tile. When it abuts another tile it will stop automatically. 3) Press E to lock it (it will also lock automatically when it abuts another tile. Tiles have to abut each other in order for the flame to spread properly. When the simulation is running the tiles cannot be moved.