Are my eye's going crazy

Can somebody please tell me if there is a circle in the middle of the screen

{1} keep looking into the middle
{2} backup a bit away from your computer

thanks

Graphics 800,600,0,0

Local ticks:Double=0,ox:Double,oy:Double

While Not KeyHit(key_escape)
Cls
SetClsColor 255,255,255

	ox = Sin(ticks)*100
    	oy = Cos(ticks)*100

    	SetColor 0,0,255
    	DrawOval 417+ox-32,317+oy-32,30,30

    	SetColor 0,255,0
    	DrawOval 417-ox-32,317+oy-32,30,30

	SetColor 255,0,0
    	DrawOval 417+ox-32,317-oy-32,30,30

	ox1 = Sin(ticks1)*140
    	oy1 = Cos(ticks1)*140

    	SetColor 0,0,255
    	DrawOval 417+ox1-32,317+oy1-32,30,30

	ticks:+10
	ticks1:+2

Flip
Wend

I saw a circle briefly but i couldnt get it back once it disappeared. Maybe my eyes adjusted too it?

Hmmm, i only see some moving circles...no ghost circle in the middle.

Optical illusion...

As soon as you focus on the bonus circle it disappears.

cool cause this is good to create a one of those 3d illusions

I see nothing but white in the middle, no matter how far away I get from it.