Let an object move with AnimatedPositioned

Question

I asked this question in this link Transition with futter move object

how i can make movig an object with AnimatedPositioned ? if i want an object move with a value = 1, or a value = 10

or something like that:

i = 0;
i++;

or

i = 0;

i = i + 10;

how i can do that with AnimatedPositioned