diff --git a/README b/README
index ea2c4ea..e42b0a3 100644
--- a/README
+++ b/README
@@ -1,2 +1,5 @@
-#backup pubkeys to qr codes
+# backup pubkeys to qr codes
 gpg --export | hex -c -w 4200 | xargs -l qrencode -t utf8
+
+# stream a file to the screen for reading with zbarcam
+cat rand | hex -c -w 1000 | xargs -l -I {} bash -c 'sleep 0.2; echo {} | qrencode -t utf8'