You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: genlengthsorted.rb
    path of file: ./repos/genometools/scripts
    
    the code of the file until where you have to start completion: #!/usr/bin/env ruby

# generate random DNA sequence of approx. the given totallength, such that the
# sequence are ordered according to their length, with the shortest sequences
# coming first. Ste
    
def randseq(width,len)
  seq = ""
  currentwidth=0
  0.upto(len-1) do |idx|
    r = rand(3)
    cc = ['a','c','g','t'][rand(4)]
    seq += "#{cc}"
    if currentwidth < width
      currentwidth+=1
    else
      seq += "\n"
      currentwidth=0
    end
  end