Highlight duplicates across all worksheets

[Babay]

Hello forum!
I'm new to excel and hope you guys could help.
Currently I'm using Zoho sheets (sorry for post in Excel forum, but community in Zoho not such big as here and things are pretty same) and I need to update this simple script to make it search and always highlight all sheets in document. It's hard to every time change macro when I add extra sheet.

Sub highlightDups()    
    Dim ws1 As Worksheet
    Dim ws2 As Worksheet
    
    Dim maxOne As Long
    Dim maxTwo As Long
        
    
    Set ws1 = Sheets("One") 'change me
    Set ws2 = Sheets("Two") 'change me
    
    maxOne = ws1.Cells(Rows.count, "A").End(xlUp).Row
    maxTwo = ws2.Cells(Rows.count, "A").End(xlUp).Row
    
    
    For x = 2 To maxOne Step 1
        For y = 2 To maxTwo Step 1
        
            If ws1.Cells(x, 1) = ws2.Cells(y, 1) Then
                ws1.Cells(x, 1).Interior.ColorIndex = 3
                ws2.Cells(y, 1).Interior.ColorIndex = 3
                GoTo Skip
            End If
        
        Next y
Skip:
    Next x
    


End Sub

 

[Babay]

Basically what I need is search and highlight duplicates in Sheet1 A1-End vs All other sheets.