DrAzzy.
Many thanks, you are correct, i did cut and paste from the instructables web site. i did as you recommended and the sketch "compiled" first time, unfortunately when uploading i immediately got the following can you help again please ?
[codeArduino: 1.8.5 (Windows 7), Board: "Arduino/Genuino Uno"
Sketch uses 4158 bytes (12%) of program storage space. Maximum is 32256 bytes.
Global variables use 81 bytes (3%) of dynamic memory, leaving 1967 bytes for local variables. Maximum is 2048 bytes.
C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf -v -patmega328p -carduino -PCOM4 -b115200 -D -Uflash:w:C:\Users\dell\AppData\Local\Temp\arduino_build_107122/sketch_may14f.ino.hex:i
avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"
Using Port : COM4
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x81
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x81
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x81
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x81
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x81
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
]