How to add a progress, loading, spinner, process in bash script?

Usage

Save to file progre.sh and run chmod +x progre.sh && ./progre.sh

#!/bin/bash

progreSh() {
    LR='\033[1;31m'
    LG='\033[1;32m'
    LY='\033[1;33m'
    LC='\033[1;36m'
    LW='\033[1;37m'
    NC='\033[0m'
    if [ "${1}" = "0" ]; then TME=$(date +"%s"); fi
    SEC=`printf "%04d\n" $(($(date +"%s")-${TME}))`; SEC="$SEC sec"
    PRC=`printf "%.0f" ${1}`
    SHW=`printf "%3d\n" ${PRC}`
    LNE=`printf "%.0f" $((${PRC}/2))`
    LRR=`printf "%.0f" $((${PRC}/2-12))`; if [ ${LRR} -le 0 ]; then LRR=0; fi;
    LYY=`printf "%.0f" $((${PRC}/2-24))`; if [ ${LYY} -le 0 ]; then LYY=0; fi;
    LCC=`printf "%.0f" $((${PRC}/2-36))`; if [ ${LCC} -le 0 ]; then LCC=0; fi;
    LGG=`printf "%.0f" $((${PRC}/2-48))`; if [ ${LGG} -le 0 ]; then LGG=0; fi;
    LRR_=""
    LYY_=""
    LCC_=""
    LGG_=""
    for ((i=1;i<=13;i++))
    do
    	DOTS=""; for ((ii=${i};ii<13;ii++)); do DOTS="${DOTS}."; done
    	if [ ${i} -le ${LNE} ]; then LRR_="${LRR_}#"; else LRR_="${LRR_}."; fi
    	echo -ne "  ${LW}${SEC}  ${LR}${LRR_}${DOTS}${LY}............${LC}............${LG}............ ${SHW}%${NC}\r"
    	if [ ${LNE} -ge 1 ]; then sleep .05; fi
    done
    for ((i=14;i<=25;i++))
    do
    	DOTS=""; for ((ii=${i};ii<25;ii++)); do DOTS="${DOTS}."; done
    	if [ ${i} -le ${LNE} ]; then LYY_="${LYY_}#"; else LYY_="${LYY_}."; fi
    	echo -ne "  ${LW}${SEC}  ${LR}${LRR_}${LY}${LYY_}${DOTS}${LC}............${LG}............ ${SHW}%${NC}\r"
    	if [ ${LNE} -ge 14 ]; then sleep .05; fi
    done
    for ((i=26;i<=37;i++))
    do
    	DOTS=""; for ((ii=${i};ii<37;ii++)); do DOTS="${DOTS}."; done
    	if [ ${i} -le ${LNE} ]; then LCC_="${LCC_}#"; else LCC_="${LCC_}."; fi
    	echo -ne "  ${LW}${SEC}  ${LR}${LRR_}${LY}${LYY_}${LC}${LCC_}${DOTS}${LG}............ ${SHW}%${NC}\r"
    	if [ ${LNE} -ge 26 ]; then sleep .05; fi
    done
    for ((i=38;i<=49;i++))
    do
    	DOTS=""; for ((ii=${i};ii<49;ii++)); do DOTS="${DOTS}."; done
    	if [ ${i} -le ${LNE} ]; then LGG_="${LGG_}#"; else LGG_="${LGG_}."; fi
    	echo -ne "  ${LW}${SEC}  ${LR}${LRR_}${LY}${LYY_}${LC}${LCC_}${LG}${LGG_}${DOTS} ${SHW}%${NC}\r"
    	if [ ${LNE} -ge 38 ]; then sleep .05; fi
    done
}

printf "\n\n\n\n\n\n\n\n\n\n"
progreSh 0
progreSh 10
progreSh 20
progreSh 30
progreSh 40
progreSh 50
progreSh 60
progreSh 70
progreSh 80
progreSh 90
progreSh 100
printf "\n\n\n\n\n\n\n\n\n\n"

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