Each sheet  has a unique name (user-assigned, if the defaults are
changed), and also a unique number. See the Excel VBA object model for
how to handle unique numbers. I am going to demonstrate this for unique
names only.

You can tackle this as follows:
-----------------------------------------------------------
Sub Rectangle_Sheets()

' This procedure calls the rectangle_make macro  for user-defined sheets
in this workbook.

Dim i As Integer

For i = 1 To 4
Sheets("Sheet" & i).Select
Call rectangle_make
Next i

Sheets("Sheet7").Select
Call rectangle_make

For i = 9 To 10
Sheets("Sheet" & i).Select
Call rectangle_make
Next i

End Sub

The solution is good. But calling the rectangle_make program for each sheet
will be cumbersome.
I have provided a simplified version below:

Sub Rectangle_Sheets()

' This procedure calls the rectangle_make macro  with teh sheet  Number as the
argument

' Define an array with the sheet numbers that you want the rectangle in
RecSh = Array(1, 2, 3, 4, 7, 9, 10)
' Loop thru the array and call the "rectangle_make" macro for each sheet
' You don't need to select the sheet
For i = 1 To UBound(RecSh)
Call rectangle_make(RecSh(i))
Next i

End Sub
--------------------------------------------------------------------------------\
-----
' This macro is called by the main program
Sub rectangle_make(ShNo)

Set myDocument = Worksheets(ShNo)
' Add a rectangle at 150, 50 of size 300x200
myDocument.Shapes.AddShape msoShapeRectangle, 150, 50, 300, 200

End Sub