[rohiem]

ممكن تأخذ الفكرة من الكود التالي

كود :

'هنا تكتب الكود الذي تريده يتكرر ( في سب جديد )
Sub re()
        TextBox1.Hide()
                TextBox1.BackColor = Color.Black
        TextBox1.Show()

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Timer1.Start()
    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        Timer1.Interval = 1000
        re()
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Timer1.Stop()
    End Sub