--- a/langs.sty	Sat Jun 16 20:54:58 2018 +0100
+++ b/langs.sty	Sat Jun 16 20:55:51 2018 +0100
@@ -69,7 +69,7 @@
         xleftmargin=8mm,
         emphstyle=\color{codeblue}\bfseries,
         keepspaces,
-        %linebackgroundcolor={\ifodd\value{lstnumber}\color{capri!3}\fi}
+        linebackgroundcolor={\ifodd\value{lstnumber}\color{capri!3}\fi}
 }
 
 \lstset{language=Scala,