yes, that was a dumb question... Use the animate only effect on frame one, add to timeline, strech to desierd length and play. For me, I had to set it to 1 minute 14.43 seconds to get the countdown to last for 10 seconds... But it turns out if I start it at 14 seconds into a minute it ends at the 60th second...
Thank you Andrew!!! This must have taken some work.