Highlight Cells Using A Button

I am trying to use a button, that when pressed it highlights certain cells in a row

I have the following code

Sub HiLite()
With Range("C20:Q20")
.FormatConditions.Delete
If Range("C20").Interior.ColorIndex = 3 Then
.Interior.ColorIndex = xlNone
Else
.Interior.ColorIndex = 3
End If
End With
End Sub

This works fine, but when i press the button again it clears the highlighted cells back to normal but any highlighted text etc or conditional formatting is deleted

Is there a way of returning to what was there before the first press of the button?

Just incase it is pressed accidently etc, as there will be many rows with the same button