Draw Grid in Terminal (buildings)

#!/bin/bash
######################################################################
#Copyright (C) 2024  Kris Occhipinti
#https://filmsbykris.com

#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation version 3 of the License.

#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.

#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <http://www.gnu.org/licenses/>.
######################################################################

clear

function draw_grid() {
  start_x=$1
  width=$(($start_x + $2))

  start_y=$3
  height=$(($start_y + $4))

  # hide cursor
  printf "\033[?25l"
  for x in $(seq $start_x 2 $width); do
    for y in $(seq $start_y $height); do
      printf "\033[${y};${x}H█"
      sleep .001
    done
  done

  for x in $(seq $start_x $width); do
    for y in $(seq $start_y 2 $height); do
      printf "\033[${y};${x}H█"
      sleep .001
    done
  done

  # show cursor
  printf "\n\033[?25h"
}

draw_grid 4 40 10 15
printf "\033[34m" # blue
draw_grid 72 40 10 6
printf "\033[31m" # red
draw_grid 40 40 2 14
printf "\033[0m" # reset color