bedrock_b_spinner.sh

#!/bin/sh

norm_color='\033[2;97m'
high_color='\033[0;97m'

drawing='__
\ \___
 \  _ \
  \___/
'

order='0,0
1,0
2,1
3,1
4,1
5,1
6,2
6,3
5,3
4,3
3,3
2,3
1,2
0,1'

delay_sec="0.08"

cursor_hide='\033[?25l'
cursor_save='\033[s'
cursor_restore='\033[u'
cursor_left='\033[1D'

draw() {
	i="${1}"
	color="${2}"

	x="$(echo "${order}" | awk -F',' -v"i=${i}" 'NR==i {print $1}')"
	y="$(echo "${order}" | awk -F',' -v"i=${i}" 'NR==i {print $2}')"
	if [ -n "${color}" ]; then
		c="$(echo "${drawing}" | awk -v"x=${x}" -v"y=${y}" 'NR==(y+1) {print substr($0,(x+1),1);exit}')"
	else
		c=" "
	fi

	printf "${cursor_restore}"
	[ "${x}" -gt 0 ] && printf "\033[${x}C"
	[ "${y}" -gt 0 ] && printf "\033[${y}B"
	printf "${color}%s${cursor_left}" "${c}"
}

max="$(echo "${order}" | wc -l)"
printf "${cursor_hide}"
clear
printf "${cursor_save}"
printf "\033[4C\033[2B${norm_color}_"

h=$((max/2))
n=$((h-2))
b=0
while :; do
	h=$((h+1))
	n=$((n+1))
	b=$((b+1))
	[ "${h}" -gt "${max}" ] && h=1
	[ "${n}" -gt "${max}" ] && n=1
	[ "${b}" -gt "${max}" ] && b=1

	draw "${h}" "${high_color}"
	draw "${n}" "${norm_color}"
	draw "${b}" ""
	sleep "${delay_sec}"
done