Thank you, basically its like in Minecraft when a dirt block (affected) is next to a grass or water block (effecter) it will turn into a grass block (result).
In the reference book the top blocks are the "effecters", the middle ones are the "affected" blocks and the bottoms ones are the "results" (what the affected block turns into).
For level 2 you need to replace the water block between the two grass blocks with one of the stone blocks, then that same stone with one of the grass (turning the stone into sand since it's next to other sand blocks). Lastly replace the grass block not adjacent to water with the last stone block.
Hopefully that was understandable for I'm not very good at explaining things. Again Thanks for trying it out!