1. From the main dashboard menu tap on the settings icon in the top left corner of the screen. Then tap on "GameSettings" from the list of options.  

2. Now tap on "Game Intervals". 

3. Now tap on the game interval that you would like to change. 

4. Here you can change the time of the interval. Tap on the "Time Duration" textbox and type the time you want your game period to be. You can also change the name of the game period here also if needed. Once happy tap on "Save". 

5. Repeat the process for the second game interval. Once completed tap on "Save" to confirm the changes made.