GOT IT !!!

code:
break on

$form = createobject("kixtart.form")
$form.caption = mainform
$form.fontname = verdana
$form.fontsize = 12

$button = $form.commandbutton("just a button")
$button.center

$form.center
$form.show

$DELAY = 4000 ; msecs
$timer = @TICKS+$delay

while $form.visible

$=execute($form.doevents(1))

if @TICKS > $timer
$form.show(0)
pop()
$form.show
$timer = @TICKS+$delay
endif

sleep(0.01)

loop

exit 1

function pop

dim $popup,$timer

$popup = createobject("kixtart.form")

$popup.caption = popup
$popup.witdh = 200
$popup.height = 200

$popup.center
$popup.show

$timer = @TICKS+$delay

while $popup.visible

$=execute($popup.doevents(1))

if @TICKS > $timer
$popup.show(0) ; <--- heres the bugger
endif

sleep(0.01)

loop

endfunction