Google Maps APP

Having a list of worldwide cities (lat & lon), and having an origin city, the APP must show 'lines' from all combinations (Origin-Destination city). When the cursor is over each line, this line must change color and show a textblock with info. When the cursor is off this line, the line changes color again to the original value. The city's list, is a json file, containing 'name', 'latitud', 'longitud', 'a 3 letters code', 'a price', 'a 4 letters code'.