Bash Spinner

spinner.sh

#/bin/sh

spinner=("    " "1   " "10  " "101 " " 010" "  01" "   0")
spinner_length=${#spinner[0]}

function spin() {
  tput cuf "$spinner_length"
  while [ 1 ]; do
    for i in "${spinner[@]}"; do
      tput cub "$spinner_length"
      tput ech "$spinner_length"
      printf "%s" "$i"
      sleep 0.1
    done
  done
}

function start_spinner() {
  tput civis
  spin &
  spinner_pid=$!
}

function stop_spinner() {
  tput cnorm
  kill -9 $spinner_pid >/dev/null 2>&1
  tput cub "$spinner_length"
  tput ech "$spinner_length"
}

trap stop_spinner $(seq 0 15)