Make lblAvg.Text blink five times in Visual Basic

I'm learning and I am stuck on how to do the following: Once the average is displayed in lblAvg.Text, I need to make lblAvg.Borderstyle = BorderStyle.None, then make the text blink five times, and then return lblAvg.BorderStyle = FixedSingle. I am lost on how to make this happen. Here is the syntax that I have for the Visual Basic Exercise:

PrivateSubbtnCalc_Click(senderAsObject, eAsEventArgs)HandlesbtnCalc.Click

' calculates and displays the average sales amount

ConststrPROMPTAsString=

           "Enter a Sales Amount. Click Cancel to End."

      ConststrTITLEAsString="Sales Entry"

DimstrInputSalesAsString

DimintNumSalesAsInteger'Counter

DimdecTotalSalesAsDecimal'Accumulator

DimdecSalesAsDecimal

DimdecAverageAsDecimal

' initialize counter and accumulator

' InputBox First Sales Amount

strInputSales = InputBox(strPROMPT, strTITLE, "0.00")

DoWhileNotstrInputSales = String.Empty

      Decimal.TryParse(strInputSales, decSales)

      IfstrInputSales = 0Then

           MessageBox.Show("Please Enter a Valid Sales Amount",

           "No Sales Amount Has Been Entered", MessageBoxButtons.OK,

      EndIf

' get another sales amount

           InputBox(strPROMPT, strTITLE, "0.00")

Loop

IfintNumSales <> 0Then

EndIf

lblAvg.Text = decAverage.ToString("C2")

EndSub