Check what type of coordinate block to check with the if of /execute.

Unlike "If Block", it is a new if syntax that detects

"Blocks that have already been flooded" "Blocks that transmit sunlight" "Blocks that can be filled with water" "Blocks with a capacity of less than 1 block" "Liquid block", etc.

≪Examples of blocks for each type≫ 

<Blocks that have already been flooded>

• half block filled with water
• button filled with water 

<Blocks that transmit sunlight>

• glass
• trap doors
• torch

<Blocks that can be filled with water>

• leaves
• half blocks
• mangrove roots

<Blocks with a capacity of less than 1 block>

• grass path
• soul sand
• mud
• fence

<Liquid block>

• water
• lava