Seatbelt light flashing

[Tx76210]

Hello all. This is my first post here and really likening the site.
I just got a 1999 Toyota Corolla CE this past weekend. It was my grandmothers and has not even moved in about a year. I think I am slowly figuring the ins and outs of the car. Few things I need to fix like the front door looks do not work on the lock switch or w/ the alarm remote. Figure it might just be all “gunked” up. But, this afternoon the seatbelt started flashing and will not stop. Ideas?

Thank you.

[94PrizmDD]

Put on your seat belt lol. Replace the remotes battery it might be dead from sitting for so long. oh and Welcome to the forums. That corolla must be barely broken in.