Michael's challenges - 3 - division task

[bojo1980]

Start with:

Tumble Together

Divide the left register by 2 and store the answer in the right register.

Start with 20 Red and 20 Blue.
Add anything you want.

[MattMath314]

My solution rounds the answer down. Is that allowed?

How my solution works:
Subtract 2 from left, Add 1 to right, Repeat until left underflows and stops the program.

Solution:

Tumble Together

[buddha]

My solution ignores the first bit, so it rounds down.
Here is it: Tumble Together