Test program - based on blink program from MBED

Revision:
0:10cc86071dd4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_app.json	Sun Dec 05 13:08:56 2021 +0000
@@ -0,0 +1,3 @@
+{
+    "requires" : ["bare-metal"]
+}
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