Update app.py

app.py

@@ -396,6 +396,7 @@ def create_intervene_part(pipe: HookedStableDiffusionXLPipeline, saes_dict, mean
                     height=600,
                     layers=False, transforms=None, placeholder="Generate and paint!",
                     container=False,
+                    brush=gr.Brush(default_size=40, color_mode="fixed", colors=['black']),
                     canvas_size=(512, 512),
                     label="Input Image")
                 clear_button = gr.Button("Clear")