In the grid (the sea?), there are hidden Ships and Mountains. On the shore, there are Lighthouses. Each Lighthouse scans its row/column and reports how many Ships it can see. Some ships are obscured by Mountains and therefore cannot be seen by that Lighthouse. Click on a square to place a Mountain or Ship. Find all of the ships to complete the puzzle. There may be more than one solution, but, all solutions are recognized. "New" gives you a different puzzle. "Reset" lets you try the same puzzle again.
Inspired by (and a cross between): "Lighthouses03" by @ffred https://scratch.mit.edu/projects/1270789238 and "VuPasVu 4x4" by @mathjp https://scratch.mit.edu/projects/1104235786 Mobile friendly.
