diff --git a/README.md b/README.md
index 1368340..4241048 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 This is an implementation of 256 elementary cellular automatons: http://mathworld.wolfram.com/ElementaryCellularAutomaton.html
 
 Example usage and output for rule 30:
+```
 ./cellaut.pl 10 30 30
 111111111111110111111111111111
 111111111111100011111111111111
@@ -14,8 +15,9 @@ Example usage and output for rule 30:
 111111001101110001111101111111
 111110010000100110111000111111
 111100110111101000010011011111
-
+```
 Example usage and output for rule 10:
+```
 ./cellaut.pl 10 30 110
 111111111111110111111111111111
 111111111111100111111111111111
@@ -28,3 +30,4 @@ Example usage and output for rule 10:
 111111000000010111111111111111
 111110011111000111111111111111
 111100011110010111111111111111
+```