Rocket Boots

1. [impulse] /give @p minecraft:iron_boots[custom_data={Rocket:1}]

2. [impulse] /scoreboard objectives add sneak minecraft.custom:minecraft.sneak_time

3. [impulse] /scoreboard objectives add timer dummy

4. [repeat] /execute as @a[nbt={equipment:{feet:{components:{"minecraft:custom_data":{Rocket:1}}}}}] at @s if score @s sneak matches 1.. if score @s timer matches ..100 run scoreboard players add @s timer 1

5. [chain] /execute as @a[nbt={equipment:{feet:{components:{"minecraft:custom_data":{Rocket:1}}}}}] at @s if score @s sneak matches 1.. if score @s timer matches ..100 run effect give @s minecraft:levitation 1 1 true

6. [chain] /execute as @a[nbt={equipment:{feet:{components:{"minecraft:custom_data":{Rocket:1}}}}}] at @s if score @s sneak matches 1.. if score @s timer matches ..100 run particle minecraft:flame ^-.1 ^ ^

7. [chain] /execute as @a[nbt={equipment:{feet:{components:{"minecraft:custom_data":{Rocket:1}}}}}] at @s if score @s sneak matches 1.. if score @s timer matches ..100 run particle minecraft:flame ^.1 ^ ^

8. [chain] /execute as @a[nbt={active_effects:[{id:"minecraft:levitation"}],equipment:{feet:{components:{"minecraft:custom_data":{Rocket:1}}}}}] at @s if score @s sneak matches 0 run effect clear @s minecraft:levitation

9. [chain] /execute as @a[nbt={equipment:{feet:{components:{"minecraft:custom_data":{Rocket:1}}}}}] at @s if score @s sneak matches 0 if score @s timer matches 1.. run scoreboard players remove @s timer 1

10. [chain] /execute as @a[nbt={equipment:{feet:{components:{"minecraft:custom_data":{Rocket:1}}}}}] at @s if score @s sneak matches 1.. if score @s timer matches 101 run scoreboard players set @s timer 200

11. [chain] /execute as @a at @s run scoreboard players set @s sneak 0

12. [chain] /execute as @a at @s unless score @s timer matches -1000..1000 run scoreboard players set @s timer 0

13. [repeat] /execute as @a[nbt={equipment:{feet:{components:{"minecraft:custom_data":{Rocket:1}}}}}] at @s if score @s timer matches 0..30 run title @s actionbar [{"color":"green","text":"Rocket Boots OverHeat: "},{"color":"green","score":{"name":"@s","objective":"timer"}},{"color":"green","text":"%"}]

14. [chain] /execute as @a[nbt={equipment:{feet:{components:{"minecraft:custom_data":{Rocket:1}}}}}] at @s if score @s timer matches 31..60 run title @s actionbar [{"color":"yellow","text":"Rocket Boots OverHeat: "},{"color":"yellow","score":{"name":"@s","objective":"timer"}},{"color":"yellow","text":"%"}]

15. [chain] /execute as @a[nbt={equipment:{feet:{components:{"minecraft:custom_data":{Rocket:1}}}}}] at @s if score @s timer matches 61.. run title @s actionbar [{"color":"red","text":"Rocket Boots OverHeat: "},{"color":"red","score":{"name":"@s","objective":"timer"}},{"color":"red","text":"%"}]

16. [chain] /execute as @a[nbt={equipment:{feet:{components:{"minecraft:custom_data":{Rocket:1}}}}}] at @s if score @s timer matches 101.. run title @s actionbar [{"atlas":"minecraft:gui","sprite":"dialog/warning_button"},{"color":"dark_red","text":" Rocket Boots OVERHEATED: "},{"color":"dark_red","score":{"name":"@s","objective":"timer"}},{"color":"dark_red","text":"% "},{"atlas":"minecraft:gui","sprite":"dialog/warning_button"}]