Thank you for the further information. Of course you can offer, maybe in another project I can request your professional help. But as I wrote, on this subject I will try working only in amateur basis.
If you agree to continue helping me and you can give me some hints (refer/show me some sample codes on the interntet doing this function) as a starting point for me, then I can work on them and try to modify according to my needs. (And I can ask again some little points about the code which I modified -if I can do-)