2. Langakah ke dua masukanlah source seperti berikut :
Public Class puzzle
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If Button4.Visible = False Then
Button4.Visible = True
Button1.Visible = False
Button4.Text = Button1.Text
Else
If Button2.Visible = False Then
Button2.Visible = True
Button1.Visible = False
Button2.Text = Button1.Text
End If
End If
hasil()
End Sub