Update app.py

app.py

@@ -375,6 +375,10 @@ hr {
 """
 
 with gr.Blocks() as demo:
+    cytof_state = gr.State(CytofImage())
+     # used in scenrios where users define/remove channels multiple times
+    cytof_original_state = gr.State(CytofImage())
+
     gr.HTML(custom_css)
     
     gr.Markdown('<div class="h-1">Step 1. Upload images</div>')