𝐏𝐋𝐄𝐀𝐒𝐄 𝐇𝐄𝐋𝐏: How to teleport entity to the nearest block

there is a procedure template, that checks for a specific block within a 6x6x6 box. you can modify that template, to be of any size, as long as you make sure, that the ratio stays the same. like changing the numbers from 3-6 to 8-16, if you want to check for an area the size of a chunk. you might want to verify, that the block above matching blocks is air, by adding +1 to the offset y-coordinate.

ive found a reddit post with links to pictures https://www.reddit.com/r/MCreator/comments/1flcpa2/how_to_detect_a_block_in_a_radius/
 

you can expand on the procedure, by putting the yellow blocks into an AND block to also check if the block above those same coordinates is air, by copying the same coordinates, and just adding a +1 to the y coordinate. the teleport block should go in the place where it says set logic found to true, and also use the coordinates of the airblock. you find the teleport block under entity procedures - actions, it should be the fourth block from the bottom "set location of eventtargetentity to xyz"