step

app.py

@@ -2,7 +2,7 @@ from fastapi import FastAPI
 from fastapi.responses import HTMLResponse
 
 app = FastAPI()
-state = [0,0,0,0,0,0,0,0,0]
+state = [-1,-1,-1,-1,-1,-1,-1,-1,-1]
 step = '0'
 
 @app.get("/")
@@ -52,4 +52,7 @@ def change_step():
 @app.get('/turn/{pos}')
 def turn(pos):
     change_step()
-    state[int(pos)] = int(not state[int(pos)])
+    if state[int(pos)] == '-1':
+        state[int(pos)] = step
+    else:
+        state[int(pos)] = int(not state[int(pos)])