I'm trying to find code that will change the font color or interior color in
a cell when the cell is clicked once. Then when the color changes I need to
recalculate a formula from a different cell in the same row based on which
cell was chosen and had the color change.

I was trying the following code as a start but I am getting an "End If
without a Block If" error.

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
If Not Intersect(Target, Range("L2:M500")) Is Nothing Then
Target.Interior.ColorIndex = 5
End If
End Sub

Any help is greatly appreciated.