Task:  Set a timer for 2 hours, 30 minutes and start the timer.
Steps:
Go to the Timer section at the bottom of the screen 
set the timer for 2 hours and 30 minutes 
set the timer for 2 hours and 30 minutes 
set the timer for 2 hours and 30 minutes 
set the timer for 2 hours and 30 minutes 
click on  the start button to start the timer