Check this sample program i made for you :
In windows form
place one Button and Lable:
Button Name as :Button1
Lable Name as :LBL1
Timer conral as Timer1
Declare one public integer variable as ival
Dim ival As Integer = 0
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
LBL1.Visible = True
Timer1.Interval = 200
Timer1.Enabled = True
ival = 0
Timer1.Start()
LBL1.Visible = True
End Sub
Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
If LBL1.Visible = True Then
LBL1.Visible = False
Else
LBL1.Visible = True
End If
ival = ival + 1
If ival = 7 Then
If LBL1.Visible = False Then
LBL1.Visible = True
End If
Timer1.Stop()
End If
End Sub