How do I redesign this code to improve modularity, coupling and cohesion in Ruby

My code:

# Method to write a given number to a file

def write_to_file(file, number)

file.puts number

(0...number).each { |i| file.puts i }

end

# Method to read and print data from a file

def read_from_file(file)

first_line = file.gets

end

count = first_line.to_i

(0...count).each do |i|

line = file.gets

puts "Line read: #{line}"

end

# Main method

def main

file = File.new("mydata.txt", "w")

write_to_file(file, 10)

file.close

file = File.new("mydata.txt", "r")

read_from_file(file)

file.close

end

main()

The expected output:

MacBook-Pro-6:9.1 T Fix-it mmitchell\$ ruby fix_it_answer.rb Line read: 0 Line read: 1 Line read: 2 Line read: 3 Line read: 4 Line read: 5 Line read: 6 Line read: 7 Line read: 8 Line read: 9 MacBook-Pro-6:9.1 T Fix-it mmitchell\$