The 4 LEDs are exercised one at a time moving one way then the other at the end of the row.

Dependencies:   mbed

Revision:
0:a97a819083e9
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Dec 16 21:35:17 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/4336505e4b1c
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