CODE
Interrupts short and simple: Part 1 - Good programming practices
JAVA
http://www.iitk.ac.in/esc101/05Aug/tutorial/essential/threads/timer.html
Arduino
https://www.robotshop.com/letsmakerobots/arduino-101-timers-and-interrupts
https://playground.arduino.cc/Code/Timer
Timer Class
https://msdn.microsoft.com/en-us/library/system.timers.timer(v=vs.110).aspx
Java Timer Example
https://www.journaldev.com/1050/java-timer-timertask-example
How to make a timer program in Python
https://stackoverflow.com/questions/15802554/how-to-make-a-timer-program-in-python