stopping a send/repeat loop?

[John Tenny]

First, thanks for all the encouragement. Must have been having a bad 
beard day.

Working on a timer where there are two clocks. Clicking on timer 1 
starts it and display no of seconds and % of total time; clicking on 
timer 2 stops the first timer and starts it own set of displays. 
Clicking back on timer 1 stops timer B and restarts timer 1.

Only it doesn't. I'm sure it simpler than this. Sometimes I can get one 
clock working, but the second button won't stop it. The following 
script, although they appear similar to me, get stopped by the debug 
mechanism at different points. I kinda had more success with 
switch/case, but could never get the first timer to stop when clicking 
the button for the second timer.

Anyway: -------------------Timer 1----------------
--this is off task button 1093
global passingtime1,passingtime2,passingtime3,gswitch
set the numberFormat to "0."
on mouseup
    send CountDown to me in 1 secs
end mouseup
------------
on CountDown
   put false into gswitch
   repeat until gswitch = true
     add 1 to passingtime2--timer no. 2
     put passingtime2 into cd fld "b1f2x"--display timer 2
     add 1 to passingtime3--total time both timers
     put passingtime3 into cd fld "b1f3x"--disply total time
     put (passingtime2/passingtime3*100) &  "% off task" into cd fld 
"b1f3"
         -- % time off task
     put (100-(passingtime2/passingtime3*100)) &  "% on task" into cd 
fld "b1f2"
         -- % time on task
   end repeat
  end countdown
----------------end of timer 1-----------------

-----------------timer 2-----------------
--this is on task button 1092

global passingtime1,passingtime2,passingtime3,gswitch
set the numberFormat to "0."
on mouseup
    send "CountDown" to me in 1 secs
end mouseup
------------
on CountDown
   put true into gswitch
   repeat until gswitch = false
     add 1 to passingtime1 -- timer no 1
     put passingtime1 into cd fld "b1f1x" -- display time 1
     add 1 to passingtime3 -- total time both timers
     put passingtime3 into cd fld "b1f3x" --display total time
     put (passingtime1/passingtime3*100) & "% on task" into cd fld "b1f2"
         -- % time on task
     put (100-(passingtime1/passingtime3*100)) & "% off task" into cd 
fld "b1f3"
         -- % time off task
   end repeat
end CountDown
------------------end of timer 2---------------

Hope you can help. My head hurts, my eyes won't focus, and I have to go 
to the bathroom really bad.

John