Check Worksheet Exist, If Not Add Variable Sheet Name

I need to allow users to add up to seven new worksheets as required and the new sheets must be named Image1, Image2, etc. I do not want to add seven worksheets at once, only one at a time as the need arises and no new ws can be allowed after Image7 ws is added.

I have a macro to test for the existence of ws Image1, but need help on further development to add and test for the extence of the remaining sheets.


Dim ws As Worksheet
Dim bTest As Boolean
For Each ws In Worksheets
If ws.Name = "Image1" Then
bTest = True
Exit For
End If
Next ws

If bTest = True Then
'Need some code here, not sure what I need