Here is the best thing to do:
Delete it
LOL, im not being mean but thats crap. Try making a new one and randomly inserting grass, flowers, bushes, stones, etc. If u practice with these then u can make a fairly nice level. Please don't tell me your doing those for a server.
In my opinion, thats an Auroria level.
Thats not a good thing so just practice, practice, practice.