arm.scn

scene{
  camera = view{ from = {0, 0.2, -1.2},
                  at = {0, 0, 0},
                  up = {0,1,0},
                  fov = 60,
		  imgw=512, imgh=512 },
	
  light = dist_light{ direction = {0, 1, 1} },

  object = group{
              transform = affine { translation = {0, 0, 0},
                                   rotation = {0, 0, motor{ arg{ v1 = .2 }}}},
              child = group {
			 transform =  affine { translation = {.1, 0, 0},
				               scaling = {1, .4, .4}},
                         child = primobj{ shape = sphere{radius = .1 }}
                        },
	      child = group {	
                        transform =  affine { translation = {.2, 0, 0},
                                              rotation = {0, 0, motor{ arg{ v2 = .1 }}}},
                        child = group {
			  transform =  affine { translation = {.2, 0, 0},
			                        scaling = {2, .4, .4}},
                          child = primobj{ shape = sphere{radius = .1}}
                      }
            },
       }
};