How To Play: The 7x7 grid contains various optics, mirros and color filters. Angled icons indicate mirrors, and the grade is a four-way mirror bouncing light back where it came from. Colored boxeds indicate light filters. Your task is to determine how the optics are laid out hidden inside the cubes. To determine this you may shine white light in through any outside point in the grid by click-holding on the deseired arrow. The light, after it has passed through the grid, bounced off any mirrors and gone through and filters will be seen at its exit point. Click on the grid to select a part that you think must be hidden below (hold shift to cycle back). Once you mark all the optics as they actually are, you will win. To further help you determine where things are, the upper right tells you how many of each part are in the grid. Also, the time it takes light to pass through or bounce off one grid block is a nanoblip. So, a time of 5 nanoblips may mean light passed through 2 empty blocks, bounced off a square bounce-back mirror, and has gone back out the 2 empty blocks. (Note: Lighthouses show up as a building on the minimap)