I saw an orange ball of light in cornfield raise straight up and at low altitute fly directly toward my home and over my house. It appearred as an orange ball until it was over a nearby tree. I could then see the bottom of craft which was made up of copper looking squares and rectngles which were riveted, with two cylinders which were emitting sparks. There was no sound. Object was a perfect triangle, appeared very clean and shiny, but not usual silvery color. Definitely copper colored.