Allow Focus Pomodoro timer to continue if not paused by the user. We rarely work in exact 25 minute blocks. So start with a 25 minutes countdown, but allow user to extend the focus time block to whatever time period they want by continuing the timer after the 25 minute mark.
When a Focus stops the focus timer, start the Break timer automatically. Allow break timer to continue after the 5 minute mark.
And when the user stops the Break timer, start the Focus