/*
** Time in milliseconds

1 second = 1000 milliseconds
15 minutes = 900000 milliseconds
30 seconds = 30000 milliseconds    
1 minute = 60000 milliseconds
5 minutes = 300000 milliseconds
30 minutes = 1800000 milliseconds
45 minutes = 2700000 milliseconds
1 hour = 3600000 milliseconds

*/