Draw Grid in Terminal with Escape Codes

#!/bin/bash
clear

# hide cursor
printf "\033[?25l"
for x in `seq 45 2 75`;
do
  for y in `seq 1 25`
  do
      printf "\033[${y};${x}H█"
      sleep .001
  done
done

for x in `seq 45 75`;
do
  for y in `seq 1 2 25`
  do
      printf "\033[${y};${x}H█"
      sleep .001
  done
done

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