m_index</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="o">+</span> <span class="n">bond_length</span><span class="o">*</span><span class="n">draw_norm</span>
            <span class="k">else</span><span class="p">:</span>
                <span class="c1">#First bead of the chr is at the origin</span>
                <span class="n">xyz_chr</span><span class="p">[</span><span class="n">atom_index</span><span class="p">,:]</span> <span class="o">=</span> <span cla