With Circle Timer you can in seconds design any interval program.
You can use it for basic intervals or create advanced programs with many combinations of different pausing and work.
It's all done from a single graphical interface and no typing is required.
Specify the length of the first interval (Work) and the length of the second interval (Pause). Press Play.
Set an interval and press + the number of times that the interval is settled. If you change the interval, it is added as a new ball.
You can create 12 balls and each ball can hold up to 100 intervals.