on rightclick on sign:
    player is on ground
    set {%player%-50000m-warppoint} to location of player
    message "&6&nチェックポイント&eを設定しました"
    play sound "entity.experience_orb.pickup" with pitch 0 at player
    wait 2 minecraft ticks
    play sound "entity.experience_orb.pickup" with pitch 0.5 at player
    wait 2 minecraft ticks
    play sound "entity.experience_orb.pickup" with pitch 1 at player
    wait 2 minecraft ticks
    play sound "entity.experience_orb.pickup" with pitch 1.5 at player
    wait 2 minecraft ticks
    play sound "entity.experience_orb.pickup" with pitch 2 at player