every 3 seconds:
    loop all players:
        wipe loop-player's sidebar
        set name of sidebar of loop-player to "&6&m=========================="
        set score "&6Kills: &c%{kill.%loop-player%}%" in sidebar of loop-player to 3
        set score "&6deths: &c%{death.%loop-player%}%" in sidebar of loop-player to 2
        set score "&6&m=======================" in sidebar of loop-player to 1
on death of player:
    add 1 to {kill.%attacker%}
    add 1 to {deth.%victim%}