Someone

#!/usr/bin/ruby
x = (rand(171)+30)
y = (rand(171)+30)
require 'ftools'
payload = ""
x.times do |i|
	y.times do |j|
		payload = payload + (rand(2).to_s) + " "
	end
	payload = payload + "\n"
end
Dir.mkdir "pbm" if !test ?e,"pbm"
i=0
fl = "pbm/pbm#{i}.pbm"
while File.exists? fl
	i+=1
	fl = "pbm/pbm#{i}.pbm"
end
File.open(fl,"w") { |f|
	f.puts "P1"
	f.puts "#{x} #{y}"
	f.puts payload
}
puts "wrote to #{fl}"