<robot name="square-plate">
  <link name="base_link">
    <visual>
      <material name="Blue">
        <color rgba="0.1 0.1 0.9 1.0"/>
      </material>
      <geometry>
        <box size="0.01 1 1"/>
      </geometry>
    </visual>
    <collision>
      <geometry>
        <box size="0.01 1 1"/>
      </geometry>
    </collision>
  </link>
</robot>
