<xml xmlns="https://developers.google.com/blockly/xml">
  <block type="logic_compare">
    <field name="OP">EQ</field>
    <value name="A">
      <block type="logic_negate">
        <value name="BOOL">
          <block type="logic_boolean">
            <field name="BOOL">TRUE</field>
          </block>
        </value>
      </block>
    </value>
    <value name="B">
      <block type="logic_compare">
        <field name="OP">EQ</field>
        <value name="A">
          <block type="math_arithmetic">
            <field name="OP">MULTIPLY</field>
            <value name="A">
              <shadow type="math_number">
                <field name="NUM">-1</field>
              </shadow>
            </value>
            <value name="B">
              <shadow type="math_number">
                <field name="NUM">42</field>
              </shadow>
            </value>
          </block>
        </value>
      </block>
    </value>
  </block>
</xml>
