RTOS Thread with 3 LEDs or RGB LED without any synchronization.

Revision:
0:567c690c073a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Wed Mar 22 15:16:05 2017 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#bcf7085d85b2811b5d68bdda192c754eadfb8f88