踩上去会有bossbar进度条显示，每过一秒增加百分之10而中途离开指定方块或坐标则清零。

假如是石头的话
scoreboard objectives add time dummy
bossbar add lz [""]
bossbar set minecraft:lz max 100
bossbar set minecraft:lz value 0
#高频内容
execute as @a at @s if block ~ ~-1 ~ stone run tag @s add yes
execute as @a[tag=yes] at @s bossbar set minecraft:lz players @s
execute as @a[tag=yes] at @s run scoreboard players add @s time 10
execute as @a[tag=yes] at @s run execute store result bossbar minecraft:lz value run scoreboard players get @s time
execute as @a[tag=!yes,scores={time=1..}] at @s run scoreboard players set @s time 0

高频内容能用循环命令方块来完成吗

可以，你试试就知道

execute as @a[tag=yes] at @s bossbar set minecraft:lz players @s 这条指令从bossbar后面就显示错误了

忘了打一个run，你在bossbar前面加个run啊

啊有图片摆法吗- -试了好久有点蒙，他那计分板一直疯狂增加

抱歉指令错了点， 你只需要一个循环，后面连上5个连锁，全都保持开启，然后按顺序把下面几条指令放进去就好了
1.execute as @a at @s if block ~ ~-1 ~ stone run tag @s add yes
2.bossbar set minecraft:lz players @a[tag=yes]
3.execute as @a[tag=yes] at @s run scoreboard players add @s time 2
4.execute as @a[tag=yes] at @s run execute store result bossbar minecraft:lz value run scoreboard players get @s time
5.execute as @a at @s unless block ~ ~-1 ~ stone run tag @s remove yes
6.execute as @a[tag=!yes,scores={time=1..}] at @s run scoreboard players set @s time 0

好的呢谢谢啦