Update README.md

README.md

 Simple Terminal based Boids
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+![Boids flocking around. I just think they are neat](boids.gif)
+
 small c file with boids represented in terminal, with only the libc as
 dependency. This was mostly done using Conrad Parker pseudocode boid
 implementation (http://www.kfish.org/boids/pseudocode.html), and thus lacks