examples/game_of_life.fy in fancy-0.3.0 vs examples/game_of_life.fy in fancy-0.3.1

@@ -38,10 +38,10 @@
   def simulate: amount_generations {
     "Simulate the World for a given amount of iterations (generations)."
 
     display: 0
     amount_generations times: |i| {
-      System sleep: 500 # sleep 500 ms
+      Thread sleep: 0.5 # sleep 500 ms
       self simulate
       display: (i + 1)
     }
   }