Colorful happy birthday message

birthday.sh

#!/bin/bash

red='\e[0;31m'
blue='\e[0;34m'
yellow='\e[0;33m'
green='\e[0;32m'
purple='\e[0;35m'
white='\e[0;37m'

NC='\e[0m'
del='\e[1A'

echo -e ""

while [ 0 -lt 1 ]; do
    echo -e "${del}${red}Happy Birthday!${NC}"
    sleep 0.25
    echo -e "${del}${blue}Happy Birthday!${NC}"
    sleep 0.25
    echo -e "${del}${yellow}Happy Birthday!${NC}"
    sleep 0.25
    echo -e "${del}${white}Happy Birthday!${NC}"
    sleep 0.25
    echo -e "${del}${purple}Happy Birthday!${NC}"
    sleep 0.25
    echo -e "${del}${green}Happy Birthday!${NC}"
    sleep 0.25
done