How to use wait

Revision:
0:7780c906c1c7
Child:
1:9ab7788cda37
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Thu Jan 19 11:34:26 2017 -0600
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#04a31f3b39bfbd69e155ed7c9f55880fd75278ba