Cell Colour Depending On Value Entered

I found the code below to do almost exactly what i want. However, i would like to know if it can be modified to only affect a specific cell range. In my case, the cell range is B9:AF37.


Option Compare Text 'A=a, B=b, ... Z=z
Option Explicit

Private Sub Worksheet_Change(ByVal Target As Range)

Dim Cell As Range
Dim Rng1 As Range

On Error Resume Next
Set Rng1 = ActiveSheet.Cells.SpecialCells(xlCellTypeFormulas, 1)
On Error Goto 0
If Rng1 Is Nothing Then
Set Rng1 = Range(Target.Address)
Else
Set Rng1 = Union(Range(Target.Address), Rng1)
End If
For Each Cell In Rng1