#!/bin/bash

clear

WIDTH=$(tput cols)
HEIGHT=$(tput lines)
NUMBARS=8
BARWIDTH=$(expr $WIDTH / $NUMBARS)

for (( y = 0; y < $HEIGHT; y++ )); do
    for (( n = 0; n < $NUMBARS; n++ )); do
        for (( x = 0; x < $BARWIDTH; x++ )); do
            echo -en "\e[3"$n"m█"
        done
    done
    echo
done