Small example using ultrasonic

Dependencies:   mbed

Revision:
1:8fafe8a483e9
Parent:
0:bd7dd6e79e36
--- a/Adafruit_GFX.lib	Fri Aug 11 17:36:11 2017 +0000
+++ b/Adafruit_GFX.lib	Wed Nov 22 21:36:59 2017 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/nkhorman/code/Adafruit_GFX/#7fb1d4d3525d
+http://mbed.org/users/nkhorman/code/Adafruit_GFX/#8555740e27da