让你的终端开始下雪

#!/bin/bash

LINES=$(tput lines)

COLUMNS=$(tput cols)

declare -A snowflakes

declare -A lastflakes

clear

function move_flake() {

    i="$1"

    if [ "${snowflakes[$i]}" = "" ] || [ "${snowflakes[$i]}" = "$LINES" ]; then

        snowflakes[$i]=0

    else

        if [ "${lastflakes[$i]}" != "" ]; then

            printf "\033[%s;%sH \033[1;1H " ${lastflakes[$i]} $i

        fi

    fi

    printf "\033[%s;%sH*\033[1;1H" ${snowflakes[$i]} $i

    lastflakes[$i]=${snowflakes[$i]}

    snowflakes[$i]=$((${snowflakes[$i]}+1))

}

while :

do

    i=$(($RANDOM % $COLUMNS))

    move_flake $i

    for x in "${!lastflakes[@]}"

    do

        move_flake "$x"

    done

    sleep 0.1

done