How to create air tanks Minecraft(JAVA)

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Today I will show you how to create air tanks that run out while on land or in water or whatever you want. Must be using newest snapshot of Minecraft or Minecraft 1.20 or above.
COMMANDS:

/scoreboard objectives add Water dummy

/scoreboard players add @a Water 0

/execute at @e[type=player] if block ~ ~ ~ #minecraft:leaves[] if score @p Water matches ..999 run scoreboard players add @p Water 10

/execute at @e[type=player] if block ~ ~ ~ water[] if score @p Water matches 1.. run scoreboard players remove @p Water 1

/execute if score @p Water matches 0 run damage Shadowwalker__ 10 minecraft:arrow