command /setmid:
    trigger:
        set {Mid} to player's location

command /mid:
    trigger:
        set {MidPos.None} to distance between player and {Mid}
        set {MidPos.None} to round({MidPos.None})
        send "&6&l%player%が%{MidPos.None}%mを通過しました"
on walking on diamond block:
 execute command "/mid"