Pulsating Circle

Ive been trying to make something so that when i press a command buutton, a circle grows bigger then smaller 5 times (like its pulsating) I would like the center of the circle to stay the same while i do this. Ive been able to make it pulsate but only the extreme left edge has stayed in the same place. Does anyone know how to do this?? I would be verry appreciative if you could show me using code, since i am a beginer

-Steve
-UserFriendly RULES

[Ramandeep]

Try the code bellow, yes there may be other more simpler ways off doing this but this isn't bad (what do u people think?) it not hard to understand either!

Requirements: timer, command button with caption property set to 'Start' as design time and a shape control change shape property to 3-circle, form must be called form1. Let me know how it goes.

Dim grow As String
Dim growAmount As Integer

Private Sub Command1_Click()
    growAmount = 100 'amount the circle should grow
    grow = "Big"
    If Command1.Caption = "Start" Then
        Timer1.Enabled = True
        Command1.Caption = "Stop"
    Else
        Timer1.Enabled = False
        Command1.Caption = "Start"
    End If
End Sub

Private Sub Timer1_Timer()
    Select Case grow
        Case "Big"
            Shape1.Width = Shape1.Width + growAmount
            Shape1.Height = Shape1.Height + growAmount
            If Shape1.Width >= 500 Then
                grow = "Small"
                Shape1.Width = 500
                Shape1.Height = 500
            End If
        Case "Small"
            Shape1.Width = Shape1.Width - growAmount
            Shape1.Height = Shape1.Height - growAmount
            If Shape1.Width <= 100 Then
                grow = "Big"
                Shape1.Width = 100
                Shape1.Height = 100
            End If
    End Select
    
    Shape1.Left = (Form1.ScaleWidth - Shape1.Width) / 2
    Shape1.Top = (Form1.ScaleHeight - Shape1.Height) / 2
End Sub

This is for a class that im taking (sophmore in Hisghschool), and i understand it all except case, since we havnt learned it. Anyone know a way using for...next loops? Thanks for the help though.

-Steve

I fixed it. I had to add some modular division to what i had orriginally. here it is

Private Sub Command1_Click()

For y = 1 To 4

For x = 0 To 2000
    c = c + 1
    Shape1.Width = x
    Shape1.Height = x
    If c Mod 2 = 0 Then
        Shape1.Top = Shape1.Top - 1
        Shape1.Left = Shape1.Left - 1
    End If
    Shape1.Visible = True
Next x
For x = 2000 To 0 Step -1

    c = c - 1
    Shape1.Width = x
    Shape1.Height = x
    If c Mod 2 = 0 Then
        Shape1.Top = Shape1.Top + 1
        Shape1.Left = Shape1.Left + 1
    End If
Next x

Next y
End Sub

thanks for your help Ramandeep.

-Steve

[Ramandeep]

SORRY! didn't realise you haven't used case. Glade to hear you worked it out. The Case is similar to the If then Else structure in the sense it is used to compare and execute the appropriate statements but it works much faster. You will learn about it soon.

The code I wrote I know it's not the best way but that what just come to mind at the time, it does allow you to stop the circle and continue a bit like a pause feature, might be usful in some way?

Remember there is allways more tha one way of doing somthing!!!