stop-resume timer - return flag

[feanor]

hi , i was making ctf-hq mod with half time system(team switching) , but i wanted to make it without maprestart. is there a way to stop and resume timer with a quick code ? and how should i call returnflag() function in half time , bcs players can drop flag in team switching.

		returnFlag()
{
    self notify("end_autoreturn");

     self.origin = self.home_origin;
     self.flagmodel.origin = self.home_origin;
     self.flagmodel.angles = self.home_angles;
    self.flagmodel show();
    self.atbase = true;

    objective_position(self.objective, self.origin);
    objective_team(self.objective, "none");

    self createFlagWaypoint();
    self deleteFlagMissingWaypoint();
}