(One Command) Growing Grass - Minecraft Vanilla mod 1.9

One Command Growing Grass - Minecraft Vanilla mod 1.9 
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Click here to get the command! 

THIS IS ON MINECRAFT 1.9 SNAPSHOT 16w02a!  
How to Install:  
1) Place a command block in your world  
2) In side the command block paste in the command 
3) Click 'Needs Redstone' so that it's 'Always Active' 
4) Press ENTER and it's installed! 
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What this adds:  
Randomly tall grass will grow on grass blocks, adding realism!
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Any questions or just comments then below is your zone!  
Please Favorite and Diamond If you liked!