Update app.py

app.py

@@ -318,7 +318,7 @@ with gradio.Blocks() as demo:
 
     steps = gradio.Dropdown(interpolation_options, label="Interpolation Length",
                             value=random.choice(interpolation_options))
-    btn = gradio.Button("Interpolate!")
+    btn = gradio.Button("Interpolate!", variant="primary")
     img = gradio.Image(label="Transition")
     btn.click(fn=interpolate, inputs=[t1, t2, d1, d2, th1, th2, steps], outputs=[img])
     examples = gradio.Examples(examples=[["hamburger_box", "hot_dog_box", "1.00", "1.00", "2", "2", "20"],