Help!

1994 camry le....when i turn off the car, and take the keys out, there is a noise...a dinging that happens. i had the car for over a year and it just started making this noise recently. there is about 4 dings, then a pause, then the dings again. it goes through a cycle of about 8 sets of dinigs. is there anything i should be worried about? any ideas what this could be? i thought it could be a reminder that i left the keys in, but it quits after about 8 sets. any help would be appreciated! thanks!

Does the car have a sunroof that is left slightly open? My 94 XLE dings if you leave the sunroof open and remove the key from the ignition.

Mike