B4J Question Notification bell looping continuously

[qey]

Hello everyone, so i have this notification bell, whenever new order go in the notification will be displayed like with a ticking sound. But right now for every few sec eventho all the order already done, the bell still running. i set the value of NonViewed in class global as Dim NonViewed As Int = 0. Any idea how to solve this ?

Sub TopViewed
    Dim m As Map = UTILS.apiTokenMap
    m.Put("count",1)
    m.Put("total_price",1)
'    If IsViewing = True Then
        m.Put("viewed", 1)
'    End If
    Dim params As String
    params = UTILS.convertJson(m)
    Dim jobVerif As HttpJob
    jobVerif.Initialize("", Me)
    jobVerif.PostString(Main.apiSetting.url & "Shop/SumCountViewed",params)
    jobVerif.GetRequest.SetContentType("application/json")
    Wait For (jobVerif) JobDone(Job As HttpJob)
'    Log(Job.GetString)
    If jobVerif.Success Then
        Dim parser As JSONParser
        parser.Initialize(Job.GetString)
        Dim rRoot As Map = parser.NextObject
        total_price =rRoot.Get("total_price")
        NonViewed = rRoot.Get("viewed")
        count = rRoot.Get("count")
    End If
    jobVerif.Release
End Sub

Sub NonveiwedTimer_Tick
    Try
        TopViewed
        lblNotificationNumber.Text = NonViewed
        If IsViewing <> True Then
            If NonViewed > 0 Then
                TakeOff.Play
                For i = 1 To 5
                    Sleep(200)
                    btnNotification.Text = ""
                    Sleep(200)
                    btnNotification.Text = Chr(0xF0F3)
                Next
                TakeOff.Play
            End If
        End If
        btnNotification.Text = Chr(0xF0F3)
    Catch
        Log(LastException)
    End Try
End Sub