I want to make 15min and 20min countdown

[Emily]

Something similar was done here:

40 second countdown

I’m looking to make a 40 second countdown. At the need have it say DROP IT!!! !40 (to start the countdown) Timer started (40) 10 secs later Timer (30) 10 secs later Timer (20) 10 secs later Timer (10) 5 secs later Timer (5) Timer (4) Timer (3) Timer (2) Timer (1) DROP IT!!!