What does this piece of code do?

Hi guys,

I am relatively new to vba and was just wondering if someone could explain what each line of this code does as i am trying to create an animated chart.

Public Sub AnimateChart()

    Dim i As Integer

    bFinished = False
    ThisWorkbook.Names.Add "old", [chart_values]
    ThisWorkbook.Names.Add "switch_to_record", [record_index].Value
    If [b_animation] Then
        For i = 1 To [animation_steps]
            [step] = i
            DoEvents
            If bFinished Then Exit For
        Next i
    End If
    bFinished = True

End Sub

Thanks in advance!