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#!/bin/sh
[ "$1" = "info" ] && echo "calculate lap duration" && exit 2
lap="$1"
break_rule() {
break_interval=$1
break_duration=$2
if [ $(( $lap % $break_interval )) -eq $(( $break_interval - 1 )) ] ; then
echo $break_duration
exit 0
fi
}
break_rule 6 $(( 15 * 60 )) # every 6th lap (every 3rd break) is a 15 minute break
break_rule 2 $(( 5 * 60 )) # every 2nd lap is a 5 minute break
echo $(( 25 * 60 )) # every other lap is a normal 25 minute lap
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