Write php script for google map api

I've a table in mysql database in which rows are populated with geo cordinates from gps tracker every 10 second. I want a php script which fetch the latest geo cordinates from table every 10 second and show a google map with google map api in with the marker on the latest coordinate. The marker should change its position every time a new row is added in the sql which is 10 seconds. The marker should move without page or map reloading.