How to change multiple parts colors?

So, I have made a script:

function color()
Game.Workspace.Part.BrickColor = BrickColor.new("Toothpaste")
end

script.Parent.MouseButton1Down:connect(color)

Which changes a color of a part when clicked. But I would like to know, How would I do multiple? Would I just make multiple clones in the script for each part?

Extra: This is just an extra if you want to help me with this: Make the colors fade to each color, so it will be like, Red, a bit of different colors, and then Blue.