for i in $region_highlight; do
  if [[ $param == (#b)[^0-9]##(<->)[^0-9]##(<->)(*) ]]; then
    i=("$match")
    if [[ $i[3] == *black* ]] && (($i[2] - $i[1] > 0 && $i[1] > 1)); then
      BUFFER=$BUFFER[1,$i[1]]$BUFFER[$i[2],$(($#BUFFER - 1))]
    fi
  fi
end