Dynamic Countdown Timer - vb.net

Question

I have a program that uses countdown timers, it works but I am trying to do something new with this blender timer. It uses a NumericUpDown and is supposed to add 5 minutes for each value, 1 being 5 minutes and 2 being 10 minutes etc. I did find a way adding 5 minutes to BlenderCountDownFrom but when pressing the BlenderButton to stop it, it kept the new value. I am a complete novice and don't know what I am doing so the code is probably horrible! The actual countdown code I got from an example on the internet.
BlenderButton is both the start and stop for the countdown. It will use a "Set" button to program the amount of minutes from the NumericUpDown.
Dim BlenderCountDownFrom As New TimeSpan(0, 5, 1)
Dim BlenderStopwatch As New Stopwatch
Private Sub BlenderButton_Click(sender As Object, e As EventArgs) Handles BlenderButton.Click
If BlenderButton.Text = "Start" Then
BlenderTimer.Interval = 100
BlenderButton.Text = "Stop"
BlenderTimer.Start()
BlenderStopwatch.Reset()
BlenderStopwatch.Start()
Else
BlenderButton.Text = "Start"
My.Computer.Audio.Stop()
BlenderTimerLabel.BackColor = Color.White
BlenderTimer.Stop()
BlenderStopwatch.Stop()
BlenderTimerLabel.Text = ("00:05:00")
Me.MiscTab.Text = "Misc"
End If
End Sub
Private Sub BlenderTimer_Tick(sender As Object, e As EventArgs) Handles BlenderTimer.Tick
If BlenderStopwatch.Elapsed <= BlenderCountDownFrom Then
Dim toGo As TimeSpan = BlenderCountDownFrom - BlenderStopwatch.Elapsed
BlenderTimerLabel.Text = String.Format("{0:00}:{1:00}:{2:00}", toGo.Hours, toGo.Minutes, toGo.Seconds)
Else
BlenderTimer.Stop()
My.Computer.Audio.Play(My.Resources.Alarm.Blender, AudioPlayMode.BackgroundLoop)
Me.MiscTab.Text = "Alarm"
BlenderStopwatch.Stop()
BlenderTimerLabel.BackColor = Color.Red
End If
End Sub
Private Sub BlenderSetButton_Click(sender As Object, e As EventArgs) Handles BlenderSetButton.Click
If BlenderUpDown.Value = 1 Then
BlenderTimerLabel.Text = ("00:05:00")
End If
If BlenderUpDown.Value = 2 Then
BlenderTimerLabel.Text = ("00:10:00")
'This below doesn't work
Dim BlenderCountDownFrom As New TimeSpan(0, 10, 1)
End If
If BlenderUpDown.Value = 3 Then
BlenderTimerLabel.Text = ("00:15:00")
End If
If BlenderUpDown.Value = 4 Then
BlenderTimerLabel.Text = ("00:20:00")
End If
If BlenderUpDown.Value = 5 Then
BlenderTimerLabel.Text = ("00:25:00")
End If
End Sub