Display an animated Sinuswave using GREY_SCALE_MODE for the display. Well - its my forst program.

Dependencies:   microbit

Revision:
0:54e78c24b373
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/microbit.lib	Tue Aug 22 09:37:33 2017 +0000
@@ -0,0 +1,1 @@
+https://mbed.org/teams/Lancaster-University/code/microbit/#4b89e7e3494f