Car Won't Stop Making (key in ignition) Ding-Ding Sound!
 

I turned my electricity on in my car to roll down my windows while I did the interior, and listen to music, and when I was finished, I turned the key off, and it immediately started making the sound like my door was open and the key was still in the ignition, but the doors were closed. Now it blinks when the key is removed, all doors closed. I tried disconnecting and reconnecting the battery, it did nothing, what do I do?

WHat blinks when the key is removed?

Sorry...no blinking, just dinging. I wrote it in a hurry and for some reason said "blink" instead of ding, which I should have said.