terminal matrix screensaver

matrix_screensaver.sh

function cmatrix_auto(){
  while :
  do
    read -n 1 -t 100 ch
    if [ ! -z "$ch" ]
    then
      fg
    fi

    if [ $(xprintidle) -gt 1000 ]
    then
      cmatrix & CMATRIX_PID=!$
      echo $CMATRIX_PID
    fi
  done
}

cmatrix_auto & CMATRIX_PID=$!

function cmatrix_stop(){
  while : 
  do
    read -n 1 -t 100 ch
    if [ ! -z "$ch" ]
    then
      echo 'pid' $CMATRIX_PID
      kill -l $CMATRIX_PID
    fi
  done
}