height="400" 

        canvas_background="255" 

        x="100" 

        y="100">

  <ellipse w="50" h="50" fill_color="255, 0, 0">

        <_ on="key_is_down(LEFT_ARROW)" x="x - 5"></_>

        <_ on="key_is_down(RIGHT_ARROW)" x="x + 5"></_>

        <_ on="key_is_down(UP_ARROW)" y="y - 5"></_>

        <_ on="key_is_down(DOWN_ARROW)" y="y + 5"></_>

  </ellipse>

</canvas>