for 

Usage:
for (Condition,sleep time) {Command Block};

Description:
       For will repeat execution of a command block as long as condition evaluates to be true. It will sleep sleep time seconds in between checks/executions

Example:


QLAD Script

# This will make a (annoying) HUD message for a player every half second when
# they have a killstreak of 30 or more, for as long as they have the killstreak.
# This of course requires the qlad_streak.cfg to be enabled, and the killstreak
# tracking to be enabled

on a_streak_k.e {
  equal 30;
  cmd {
   for (streak_k.e>29,.5) /say_hud (targ=$(pz),chan=0,len=1,color=$random(0,255) 0 0) BigOlKillStreak;
  };
};