I am trying to construct a formula that will be based on the result of
an adjoining cell. I need to point to specific cell depending on what
the number is in that adjoining cell.

So for example:

If D1 = 0 or 1 - point to B21
If D1 = 2, 3, 4, or 5 - point to B22
If D1 = 6,7,8,9, or 10 - point to B23

and so on...

Rather than listing all of those variables, I know I should be able to
write it as equal to/greater than, but less than. I just don't know
how to express as a formula.

Thanks in advance for your help.