added bash script

README.md

@@ -1,3 +1,23 @@
 # lenovo_radio_button
 
-Make use of that physical button on the side of  your laptop to run scripts instead of only turning your wifi on/off.
+Make use of that physical button on the side of  your laptop to run scripts instead of only turning your wifi on/off.
+
+```
+#!/bin/sh
+
+# Simple bash script to run any command using the hardware radio switch on lenovo thinkpad x201 
+
+# The script checks the status of your wifi card's transmit power.
+
+# Important, the script below assumes your wifi is ON when running the script. It checks this every two seconds and when you flip the switch will run a command (echo "Wifi is OFF") and stop the script (break)
+
+while true; do
+if iwconfig wlp2s0 | grep 'Tx-Power=off' > /dev/null; then
+	echo "Wifi is OFF"
+	break
+else
+	echo "Wifi is ON"
+fi
+sleep 2
+done
+```