How do I check what tiles are around another tile?

I have a this 10 x 10 grid and I am using an array to fill the grid with two different tiles from a tilemap, tile 0 and tile 1. After fill the grid, I need to check all tiles around (up, down, left, right) the slots filled with tile number 1(green). If they are all tiles number 0(red), I need to change the tile number 1 by another one, the tile number 2 (blue).

I know i can compare the tiles at a specific position, but how to check what tiles are around them? Thanks!

c3p: https://1drv.ms/u/s!AmNDfP3N-nupprp3L4j33raqECgsuw?e=9G4ZR8

You can loop through the whole tile Map and check the 4 neighbours.

Note: The ones that are the edges they can not be surrounded by for red so you may need to count with (Tile = -1) if you want to convert them to blue swell

https://www.dropbox.com/s/pyp9e5r61zd5ebz/grid.c3p?dl=0

In the example, I put them separated the events to add comments so you can visualize how to check each side but once you know how it works you can combine them all in one condition like this: