GFork

How to Install scripts? (Click here)

You can choose which times the script should work!
https://jsfiddle.net/zt7tfqL5/1/
Some examples of settings you can do are;
*First box numbers value/Second box numbers value
4/11 morning time
12/16 afternoon time
17/20 evening time
23/23 All day and night
12/12 Only at 12PM
21/8 From 9PM to 8AM (Default)

*Military times are used.
*The script is always executed during midnight.