diff --git a/discoart/helper.py b/discoart/helper.py
index de54b87..4f9f762 100644
--- a/discoart/helper.py
+++ b/discoart/helper.py
@@ -176,7 +176,7 @@ class NOP:
         def __call__(self, *args, **kwargs):
             return NOP()
 
-        __getattr__ = __enter__ = __exit__ = __call__
+        __getattr__ = __enter__ = __exit__ = __iadd__ = __add__ = __call__
 
     if is_jupyter():
         from IPython import display as dp1
@@ -200,6 +200,8 @@ def __call__(self, *args, **kwargs):
 
             nondefault_config_handle = HTML()
             all_config_handle = HTML()
+            completed_handle = HTML()
+            completed_handle.value = '<h4>Completed images will be displayed below</h4>'
             code_snippet_handle = Textarea(rows=20)
             tab = Tab()
             tab.children = [
@@ -207,9 +209,16 @@ def __call__(self, *args, **kwargs):
                 nondefault_config_handle,
                 all_config_handle,
                 code_snippet_handle,
+                completed_handle,
             ]
             for idx, j in enumerate(
-                ('Preview', 'Non-default config', 'Full config', 'Code snippet')
+                (
+                    'Preview',
+                    'Non-default config',
+                    'Full config',
+                    'Code snippet',
+                    'Completed',
+                )
             ):
                 tab.set_title(idx, j)
 
@@ -218,6 +227,7 @@ def __call__(self, *args, **kwargs):
                 config=nondefault_config_handle,
                 all_config=all_config_handle,
                 code=code_snippet_handle,
+                completed=completed_handle,
                 progress=pg_bar,
             )
 
diff --git a/discoart/persist.py b/discoart/persist.py
index 3a49c01..697a39d 100644
--- a/discoart/persist.py
+++ b/discoart/persist.py
@@ -80,8 +80,12 @@ def _sample(
 
             _display_html.append(f'<img src="{c.uri}" alt="step {j} minibatch {k}">')
 
+            if cur_t == -1:
+                _handlers.completed.value += f'<br>seed: {da[k].tags["seed"]}<br><img src="{c.uri}" alt="step {j} minibatch {k}"><br>'
+
         if is_display_step:
             _handlers.preview.value = '<br>\n'.join(_display_html)
+
         logger.debug('sample and plot is done')
         is_sampling_done.set()
 
diff --git a/discoart/runner.py b/discoart/runner.py
index 0c71d2c..631753e 100644
--- a/discoart/runner.py
+++ b/discoart/runner.py
@@ -358,8 +358,10 @@ def cond_fn(x, t, **kwargs):
             )
         free_memory()
 
-        _da = [Document(tags=copy.deepcopy(vars(args))) for _ in range(args.batch_size)]
-        _da_gif = [Document() for _ in range(args.batch_size)]
+        _da = DocumentArray(
+            [Document(tags=copy.deepcopy(vars(args))) for _ in range(args.batch_size)]
+        )
+        _da_gif = DocumentArray([Document() for _ in range(args.batch_size)])
         da_batches.extend(_da)
 
         cur_t = diffusion.num_timesteps - skip_steps - 1