@PaulS I didn't mean to offend you with the coding. To be honest I'm a complete Newbie, and someone wrote this code for me in order to help me learn further.
It's not that I can't be bothered, I just don't know what is considered 'readable code' and what isn't. If you'd like to tell me what is I'd be happy to learn that too. To be honest I don't find your statements that helpful or encouraging.
@a-by thanks for that feedback, and your honest 'PS' too 
I'll try using different pins and see if that helps, many thanks!!!