Thankyou, Tech, Rick and SM. I will get stuck in. I have put it off for years..I think the first time I got stuck at Leonardo Fibonacci when he explained that his numbers were based on how a population of rabbits could develope numerically if one pair gave birth to another. The numbers start with 1.1.2.3.5.8 and 13. I never got passed that I could not work out the sha...g cycle at all, it always seems if one little bunny is missing out on the fun. :-)
No I am not mad being up at this time ( Hour on in Spain) I have an early airport trip to send some visitors packing.. Once again Ta very much each for your time and effort. I like a positive start to the New year....