Fix color example and demonstrate full capabilies of SetBackground
Fix color example and demonstrate full capabilies of SetBackground

bluzye/goncurses,cha87de/goncurses,cha87de/goncurses,aquarat/goncurses,snuk182/goncurses,nodar-chkuaselidze/goncurses,nodar-chkuaselidze/goncurses,aquarat/goncurses,cha87de/goncurses,bluzye/goncurses,snuk182/goncurses