i just saw it in few levels
please tell how to create them

Somewhere in the game files is the evil eye block. Put said block into your favorite block folder, and then you can use the evil eye!

the block you're looking for is called the Bleeding Eye and you can use it in build mode by opening your bopimo client folder, then the folder called "settings" and opening the FavoriteBlocks.json file.

if you don't have any blocks favourited it should just say like "[]" or something of the like, but having blocks favourited would make it be "[1,2,3,4]" for example. what you wanna do is add the block id 61366 into the square brackets (so it'd be "[61366]" or "[1,2,3,4,61366]" respectively)

you then save your file, open your bopimo client (you may have to reload it if it's already open for the block to appear) and look in the favourite blocks tab in build mode (the one with the star icon)

t h a n k s