move flashing tools to subdirectory

codingExamples/flashLed.txt

@@ -0,0 +1,18 @@
+One-liner to flash the LED. It is not on constant LED1 as expected, but instead on output pin D8!
+
+
+1. Connect to Espruino, using screen.
+
+screen /dev/ttyACM0
+
+
+2. Press ENTER to flush serial buffer a bit, then enter one-liner.
+
+let n=false; setInterval( () => { digitalWrite("D8",n); n=!n; } , 500);
+
+
+3. Upon pressing ENTER on the Espruino console you should now see the LED flashing.
+
+
+Exit screen using: CTRL-A q
+Or kill the serial session using: CTRL-A k.