Need explanation of code please

[glensfallslady]

Can somebody explain what this code is doing. I just don't understand it.
This is from an existing macro; I understand the code but not these sections
of it. I need to alter my macro but don't dare until I understand all
sections of it.

Thanks

Set rng1 = Intersect(rng.EntireRow, .Columns(1).Resize(, 4))

Set rng2 = Intersect(rng.EntireRow, .Columns(2))

Set rng3 = Intersect(rng.EntireRow, .Columns(1).Resize(, 2))

Set rng4 = Intersect(rng.EntireRow, .Columns(4))



rng1.Copy rng3.Offset(0, -1)

rng2.Copy rng3.Offset(0, 2)

 

[Tom Ogilvy]

Sub Demo()
Dim rng As Range, rng1 As Range
Dim rng2 As Range, rng3 As Range
Dim rng4 As Range
With ActiveSheet
Set rng = .Range("A5,A7:A9,A12")
Set rng1 = Intersect(rng.EntireRow, .Columns(1).Resize(, 4))
Set rng2 = Intersect(rng.EntireRow, .Columns(2))
Set rng3 = Intersect(rng.EntireRow, .Columns(1).Resize(, 2))
Set rng4 = Intersect(rng.EntireRow, .Columns(4))
End With
Debug.Print "rng1: ", rng1.Address
Debug.Print "rng2: ", rng2.Address
Debug.Print "rng3: ", rng3.Address
Debug.Print "rng4: ", rng4.Address
End Sub

produces:
rng1: $A$5:$D$5,$A$7:$D$9,$A$12:$D$12
rng2: $B$5,$B$7:$B$9,$B$12
rng3: $A$5:$B$5,$A$7:$B$9,$A$12:$B$12
rng4: $D$5,$D$7:$D$9,$D$12