New ceiling light fixture has 3 lights. Each light has one green wire, one black wire and one white wire. My ceiling box had two black wires twisted together, two white wires twisted together and one red wire (old fixture had one white and one black. The black was connected to the red and the white was connected to the white). How do I connect my new fixture).

Twist all black of fixture together, same with white and grounds. Connect the black and white same as old fixture. Connect greens to box ground screw or ground wire.