#!/bin/bash

hola(){
    echo -e "${color} HOLA"
    echo -e "${color} HOLA"
    echo -e "${color} HOLA"
}

adios(){
    echo -e "${color} ADIOS"
    echo -e "${color} ADIOS"
    echo -e "${color} ADIOS"
}

bucle(){

x=0
    while [ $x -le 4 ];do
        for i in  hola  hola_dos ; do
            sleep 0.5 &&  echo -e -n "r$i"
        done
        x=$[ $x + 1 ]
    done
}

bucle