For client
Atlist is the easy way to create maps with multiple markers.
[{"featureType":"landscape","elementType":"geometry.fill","stylers":[{"saturation":"250"},{"hue":"#0080ff"}]},{"featureType":"road","elementType":"geometry","stylers":[{"lightness":50},{"visibility":"simplified"}]},{"featureType":"road","elementType":"labels","stylers":[{"visibility":"on"}]}]