Space ship in a dream.

I was between 10 & 13 years old, when I had this dream about a Triangle space ship. It started at this grave yard I have never been too or seen before. I found myself sneaking through the grave yard not knowing why but just kept going. Then I seen a few other people doing the same as me just going forwared not knowing why. Then I noticed we were all heading towareds a pond, up by the waters edge is where we all went. It was weird I remember we were not speaking to each other, but I was not scared. Then all the sudden a man in white was standing above the water and started talking to us, he said he brought us all here to tell us we were using nuke power the wrong way. He said we would change that some day, and we all got a book. then he called me up there with him I stood beside him and then this bright lite came up out of the water beside him. It was like a big triangle. Then it was over.