untitled.rb

require 'io/console'
height, width = $stdin.winsize

print "\e[2J"

t = 30
loop { 
  t += 1

  print "\e[H"

  (1..height-2).each { |n|
    zoom = t
    a = [" "] * zoom
    dist = zoom/n.to_f
    (1...n).each { |i| a[i*dist] = "|" }
    puts "#{n.to_s.rjust(3)} #{a.join('')}"[0..width-4]
  }

  sleep 0.01
}