e">
    <h2>Example of NGLESS</h2>
    <pre>
ngless "0.0"
input = fastq(['ctrl1.fq','ctrl2.fq','stim1.fq','stim2.fq'])
input = unique(input, max_copies=2)
preprocess(input) using |read|:
    read = read[5:]
    read = substrim(read, min_quality=26)
    if len(read) &lt; 31:
        discard
mapped = map(input, reference='hg19')
write(count(mapped, features=[{gene}]),
        ofile='gene_counts.csv')
    </pre>
  </div>

  <div class="slide">
    <h2>Basic Properties of the Language</h2>
    <ul>
        <li>