In Nancy Drew: Sea of Darkness, Nancy must turn on the light in the lighthouse for Alex. To program it on, join the colored circles to create enough lit circles. Merge the blues together to make green. Merge two greens together to make red. Merge two reds to make trio colors (cyan, magenta, and yellow). Merge two trio colors to make light (white).
Using your keyboard arrows or hovering your mouse cursor over the arrows on the screen, move the circles down, left, up, or right to slide matching colors into each other. While there isn’t a perfect solution to refer to, keep an eye on your highest ranked colors. For example, if you have two trio/multi colored circles, move them around to slide into each other to make white, since making white is your highest goal and top priority.
Refer to the solution in the video to see how I accomplished this. Every time you start the puzzle from the beginning, the starting blue circle will be someplace new.
