1995 Ford Ranger code being heard and don't know what it me

My 95 Ford Ranger has recently started to give some type of audio signal, I hope. When I start the engine a beeping sounds and it isn't random. I hear 5 beeps, a pause, then 5 beeps. It goes through the cycle 5 times. 5 beeps pause 5 beeps pause 5 beeps pause 5 beeps pause 5 beeps. It stops after that but it will do it about once an hour sometimes and sometimes less.