#
#Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:
#
#1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
#
#By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.
#
#

a = 0
b = 1
total = total
20.times do
  printf("%d\n", a)
  sum = a+b
  a = b
  b = sum
  if a%2
  else
  total += a
  end
end
puts "\nThis is the total: "
puts total