span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">gif_screen_type</span><span class="w"></span>
<span class="w">    </span><span class="kt">integer</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">aspect_ratio</span><span class="p">,</span><span class="w"> </span><span class="n">background</span><span class="w"></span>
<span class="w">    </span><span class="kt">integer</span><span class="w"> </span><span class="kd">