fix

app.py

@@ -36,7 +36,7 @@ with gr.Blocks() as demo:
             with gr.Row():
                 gr.Textbox(label="Stroke Type", value="To sketch Blocking strokes, change brush color to green. To sketch Detail strokes, change brush color to black."),
                 dilation_strength = gr.Slider(7, 117, value=65, step=2, label="Dilation Strength"),
-            canvas = gr.Sketchpad(label="Sketch", sources=(), width=512, brush = gr.Brush(colors=["#000000"], default_size = 2, color_mode="fixed"), height=512)
+            canvas = gr.Sketchpad(label="Sketch", sources=(), width=512, brush = gr.Brush(colors=["#00FF00", "#000000"], default_size = 2, color_mode="fixed"), height=512)
             prompt_box = gr.Textbox(label="Prompt")
             with gr.Row():
                 btn = gr.Button("Generate")