if front isn´t clear, turn around

Dependencies:   mbed

Revision:
0:52952a8c6fb5
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ur_Bertl.lib	Thu Apr 23 12:14:10 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/teams/BERTL_CHEL_18/code/ur_Bertl/#e7f74f072564