Update README.md

Author: honoyr

README.md

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 ## HOW DOES IT LOOKS LIKE
 
+![filler_bot](https://user-images.githubusercontent.com/33399226/48687439-4d478080-eb76-11e8-8315-fa26a3650f60.gif)
+
 # About Filler
 Filler is an algorithmic game which consists in filling a grid of a known size in advance
 with pieces of random size and shapes, without the pieces being stacked more than one