To create a Timer Event in Unity software you will need to follow these steps:
First, go to the Project Browser under Program/Events and right click on 'Timer Events' to get the menu below:
Then choose New Event Section and you will get the following window:
In this window you will be able to set the Timer Number, Time Base, Section Language, Preset, Phase, and Protection.
Once you have determined these values you will click OK and the program section will open and you may begin writing logic in the section as seen below: