<mujoco>
<worldbody>
<light name="light0" diffuse=".5 .5 .5" pos="0 0 3" dir="0 0 -1"/>
<geom name="geom0" type="plane" size="1 1 0.1" rgba=".9 0 0 1"/>
<body name="body1" pos="0 0 1">
<joint name="joint0" type="free"/>
<geom name="geom1" type="box" size=".1 .2 .3" rgba="0 .9 0 1"/>
</body>
</worldbody>
</mujoco>