What I am attempting to do is:

within a range from a3:a12 I want the cell that is = a1 to change to a bold
font
So if A1 = 1, A4 would be bold.
a1 1

a3 0
a4 1
a5 2
a6 3
a7 4
a8 5
a9 6
a10 7
a11 8
a12 9