I see you also like abandoned places! Croatia is really beautiful, as Greece, where i was on holiday.
Well, i'd like to ask for your help or advice. I would like to setup @colorchallenge as a bot, similarly to your @photocontests bot, but i'm not an expert. How can i create it? Is there any sample code to copy-paste-modify? I'm not afraid of new challenges, i'm learning for lifetime! :)))