an> <span class="mi">0</span><span class="p">,</span>
        <span class="n">x</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span>
        <span class="n">y</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span>
        <span class="n">tilesize</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">256<