warning light on dashboard?

the last few times I have started my car from cold, 3 beeps have sounded and a red warning light has come onthe dashboard. Not one i have seen before. It doesn;t come on when i restart the vehicle and the beeps don't sound. Its not me having the handbrake on. i checked. its not fuel. i checked. i don't have a seat belt alarm either. the symbol has wavy lines on it, but it disappears before i see it really clearly, before the beeps stop. any ideas?