[أبو عمر]

Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
For i As Integer = 0 To 99
If i Mod 2 Then
For u = 1 To 3
Dim h As Integer = 4 - u
ListBox1.Items.Add(h)
Next
Else
For u = 1 To 3
ListBox1.Items.Add(u)
Next
End If
Next
End Sub