pan class="o">=</span> <span class="p">[</span><span class="n">val</span> <span class="o">*</span> <span class="mi">300</span> <span class="k">for</span> <span class="n">val</span> <span class="ow">in</span> <span class="p">[</span><span class="n">left</span><span class="p">,</span> <span class="n">bot</span><span class="p">,</span> <span class="n">right</span> <span class="o">-</span> <span class="n">left</span><span class="p">,</span> <span class="n">top</span> <span class="o">-</span> <span class="n">bot