Excel VisualBasic Script

Sub FormatBetween10And20()
    With Selection
        .FormatConditions.Delete
        .FormatConditions.Add Type:=xlCellValue, Operator:=xlBetween, _
            Formula1:="=10", Formula2:="=20"
        .FormatConditions(1).Interior.Color = RGB(255, 0, 0)
    End With
End Sub
'Format cells whose value less than 15
Sub FormatLessThan15()
    With Selection
        .FormatConditions.Delete
        .FormatConditions.Add Type:=xlCellValue, Operator:=xlLess, _
            Formula1:="=15"
        .FormatConditions(1).Interior.Color = RGB(255, 0, 0)
    End With
End Sub