/span> <span class="n">z</span><span class="p">[</span><span class="n">t</span><span class="p">,</span> <span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">squeeze</span><span class="p">()</span>
        <span class="n">prob</span> <span class="o">=</span> <span class="mf">0.2</span><span class="o">+</span><span class="n">val</span><span class="o">*</span><span class="mf">0.6</span>
        <span class="n">x</span><span class="p">[</span><span class="n">t</span><span cla