setting parameters instead of hardcoding it

app.py

@@ -22,7 +22,7 @@ MAX_SEED = np.iinfo(np.int16).max
 MAX_IMAGE_SIZE = 512
 
 DEFAULT_POSITIVE_PROMPT = None
-DEFAULT_NEGATIVE_PROMPT = "copy the original image"
+DEFAULT_NEGATIVE_PROMPT = None
 
 @spaces.GPU(duration=300)
 def infer(
@@ -31,7 +31,7 @@ def infer(
     seed=0,
     text_cfg=7.5,
     img_cfg=1.0,
-    num_inference_steps=30,
+    num_inference_steps=28,
     positive_prompt=DEFAULT_POSITIVE_PROMPT,
     negative_prompt=DEFAULT_NEGATIVE_PROMPT,
     progress=gr.Progress(track_tqdm=True),
@@ -56,7 +56,7 @@ def infer(
         use_norm=False,
         num_sampling_steps=num_inference_steps,
         timesteps_shift=1.0,
-        seed=3407,
+        seed=seed,
         progress=True,
     )
 
@@ -117,7 +117,7 @@ with gr.Blocks(css=css) as demo:
                         minimum=10,
                         maximum=50,
                         step=1,
-                        value=30,  # Replace with defaults that work for your model
+                        value=28,  # Replace with defaults that work for your model
                     )
 
                 with gr.Row():