Pomodoro Clock feedback please

hey guys i just finished the pomodoro clock timer any feedback would be great

When I keep clicking the session length minus button down to zero and then one more time, I get an alert than says it can not be negative, but then it shows a minus 1. Instead of using an alert, why not just not allow the session length to drop below 1, because it a session length of 0 minutes should not occur either. Also, do not let the break length go below 1 minute either.

thank you Randell i will keep improving i admire your skill