--- a/graphics.sty	Sun Oct 05 23:56:18 2014 +0100
+++ b/graphics.sty	Mon Oct 06 00:46:18 2014 +0100
@@ -3,6 +3,9 @@
 \usetikzlibrary{positioning}
 \usetikzlibrary{calc}
 \usetikzlibrary{automata}
+\usetikzlibrary{arrows}
+\usetikzlibrary{backgrounds}
+\usetikzlibrary{fit}
 \usepackage{graphicx} 
 \usepackage{pgfplots}