fibered prismatic shapes

fibered_prismatic.rb

# Prism shapes - naive implementation

counter = 1
stars = 5
(1..20).each do |row|
  if counter == stars * 2 - 1
    counter = 1
  else
    if counter > stars
      puts '*'*(stars * 2 - counter)
    elsif counter < stars
      puts '*'*counter
    else
      puts '*'*stars
    end
    counter += 1
  end
  
end
20.times{puts '*' * fiber.resume}

# Prism shapes - Fiber implementation
class Prismatic
  attr_accessor :stars

  def initialize(stars)
    @stars = stars
  end

  def fibered
    Fiber.new do
      counter = 1
      
      loop do
        if counter == @stars * 2 - 1
          counter = 1
        else
          if counter > @stars
            Fiber.yield(@stars * 2 - counter)
          elsif counter < @stars
            Fiber.yield(counter)
          else
            Fiber.yield(@stars)
          end
        counter +=1
        end
      end
    end
  end

  def shape(repetition)
    fiber = fibered
    (repetition * (stars * 2 -1) - (repeatation -1)).times{ puts '*' * fiber.resume}
  end
end

Prismatic.new(5).shape(3)
# produces
# *
# **
# ***
# ****
# *****
# ****
# ***
# **
# *
# **
# ***
# ****
# *****
# ****
# ***
# **
# *
# **
# ***
# ****
# *****
# ****
# ***
# **
# *