Hi everybody,
Now i will try to make downcounter at app inventor2.
At my first post  about app inventor, i made button control.
In this application we will use it and we will create a downcounter.

We will use clock, button and label component.

When we push the start button, a counter will start to count from ten to zero..

I defined a variable named “value1” that has the value of ten. At the beginning -when screeen initialized- clock is disabled. When we push the button, value of the “value1” will decrease one-by-one until it reaches to zero. When the counter’s value is zero, button’s text will change to “finished”. Then it will wait for another input as pushing.

Best Wishes,

Gökhan Öztürk