Hello everyone , We just bought a used incubator ,the styrofom type, and I have a few questions. We pluged it in about 1 hour ago and the light keeps comming on and off , it is getting warm on the windows, but since this is our first time I am a bit leary, I am actually thinking on just going to the local feed store and getting a new one with a book and knowing it is working right anyhow , but Just wanted to check here since I know you all know a lot more that I do. Anyhow , I know that it takes 21 days and I need to add water and all that , but should the light go on and off while it is heating up? Do I need to have a hatcher as well, if not , how long should they stay in the incubator before it is dangerous to them? After the 21 days, how many extra days should I leave them in there . If somone can , please give me all the basics that I need to know . I am wanting so bad to hatch babies from our own chickens. The kids are all excited and of course do not have the concept of time. Oh yeah , also , I see a lot on here about peeping and piping , can someone please define this. Thank you all so much , I get on here from time to time to just read up on what everyone does with their chickens and all , and I think you all are a great sourse for information. Thanks to any and all that post.