missiriss@MissIrissPC ~/triger> cat set.sh 
#!/bin/bash
FILE='trigered'
if [ ! -f $FILE ]; then
   touch $FILE
fi
missiriss@MissIrissPC ~/triger> cat unset.sh 
#!/bin/bash
FILE='trigered'
if [ -f $FILE ]; then
   rm $FILE
fi
missiriss@MissIrissPC ~/triger> cat triger.sh
#!/bin/bash
FILE='trigered'
if [ -f $FILE ]; then
   echo "IS 1"
   rm $FILE
else
   echo "IS 0"
   touch $FILE
fi
missiriss@MissIrissPC ~/triger>