diff --git a/applications/init.c b/applications/init.c
index eafb3d6..a07d508 100644
--- a/applications/init.c
+++ b/applications/init.c
@@ -52,8 +52,6 @@ int main_init(void)
     
     char str[] = "wifi join Dong abcd07691234";
     my_round(20);
-    rt_wlan_config_autoreconnect(RT_TRUE);
-    rt_wlan_connect("Dong", "abcd07691234");
     system(str);
     // rt_thread_mdelay(18000);
     // char *argv[] = {"wifi", "join", "Dong", "abcd07691234"};
diff --git a/applications/main.c b/applications/main.c
index e199e38..4a9b996 100644
--- a/applications/main.c
+++ b/applications/main.c
@@ -36,6 +36,8 @@ int main(void)
     rt_pin_mode(PIN_LED_B, PIN_MODE_OUTPUT);
     rt_pin_write(PIN_LED_B, PIN_LOW);
     system("snake game");
+    rt_wlan_config_autoreconnect(RT_TRUE);
+    rt_wlan_connect("Dong", "abcd07691234");
     mytime();
 
     /* init Wi-Fi auto connect feature */
diff --git a/dayandnight/mysnake.c b/dayandnight/mysnake.c
index dc5a973..e784175 100644
--- a/dayandnight/mysnake.c
+++ b/dayandnight/mysnake.c
@@ -26,7 +26,7 @@ void snake_entry(void *parameter)
     time_t t;
     /* 初始化随机数发生器 */
     srand((unsigned)time(&t));
-    int snake_list[SNAKE_MAX+1][2] = {0};
+    int snake_list[SNAKE_MAX + 1][2] = {0};
     int snake_direction[4][2] = {{0, -1}, {-1, 0}, {0, 1}, {1, 0}}; // 上，左，下，右
     int snake_food[2];
     bool food_flag = false;
@@ -49,7 +49,7 @@ void snake_entry(void *parameter)
     snake_food[0] = rand() % SNAKE_MAX;
     snake_food[1] = rand() % SNAKE_MAX;
     snake_address(snake_food[0], snake_food[1], SNAKE_SIZE, GREEN);
-    int new_direction = 0;
+    int new_head_x = 0, new_head_y = 0;
     while (1)
     {
         // if(snake)
@@ -57,19 +57,17 @@ void snake_entry(void *parameter)
         // now_direction = (now_direction+3+new_direction)%4;//防止反向,走回头路
 
         former_head = snake_head;
-        snake_head = (snake_head + 1) % (SNAKE_MAX);
 
-        snake_list[snake_head][0] = (snake_list[former_head][0] + snake_direction[now_direction][0] + SNAKE_MAX) % (SNAKE_MAX);
-        snake_list[snake_head][1] = (snake_list[former_head][1] + snake_direction[now_direction][1] + SNAKE_MAX) % (SNAKE_MAX);
+        new_head_x = (snake_list[snake_head][0] + snake_direction[now_direction][0] + SNAKE_MAX) % (SNAKE_MAX);
+        new_head_y = (snake_list[snake_head][1] + snake_direction[now_direction][1] + SNAKE_MAX) % (SNAKE_MAX);
 
-        sprintf(tmp, "(%d,%d)", snake_list[snake_head][0], snake_list[snake_head][1]);
+        sprintf(tmp, "(%d,%d)", new_head_x, new_head_y);
         // rt_kprintf("head:%d,%d\n", snake_list[snake_head][0], snake_list[snake_head][1]);
         lcd_show_string(20, 20, 16, snake_dirshow[now_direction]);
         lcd_show_string(20 + 16 * 4, 20, 16, tmp);
-        rt_thread_mdelay(900);
 
-        snake_address(snake_list[snake_head][0], snake_list[snake_head][1], SNAKE_SIZE, BLACK);
-        if (snake_list[snake_head][0] == snake_food[0] && snake_list[snake_head][1] == snake_food[1])
+        snake_address(new_head_x, new_head_y, SNAKE_SIZE, BLACK);
+        if (new_head_x == snake_food[0] && new_head_y == snake_food[1])
         {
             snake_food[0] = rand() % SNAKE_MAX;
             snake_food[1] = rand() % SNAKE_MAX;
@@ -77,7 +75,7 @@ void snake_entry(void *parameter)
             snake_len++;
             sprintf(tmp, "%d", snake_len);
             lcd_show_string(100, 105, 32, tmp);
-            if (snake_len >= SNAKE_MAX-2)
+            if (snake_len >= SNAKE_MAX)
             {
                 snake_address(snake_list[snake_tail][0], snake_list[snake_tail][1], SNAKE_SIZE, WHITE);
                 snake_tail = (snake_tail + 1) % (SNAKE_MAX);
@@ -85,8 +83,18 @@ void snake_entry(void *parameter)
         }
         else
         {
-            snake_address(snake_list[snake_tail][0], snake_list[snake_tail][1], SNAKE_SIZE, WHITE);
+            if (snake_list[snake_tail][0] == snake_food[0] && snake_list[snake_tail][1] == snake_food[1])
+            {                
+            }
+            else
+            {
+                snake_address(snake_list[snake_tail][0], snake_list[snake_tail][1], SNAKE_SIZE, WHITE);
+            }
             snake_tail = (snake_tail + 1) % (SNAKE_MAX);
         }
+        snake_head = (snake_head + 1) % (SNAKE_MAX);
+        snake_list[snake_head][0] = new_head_x;
+        snake_list[snake_head][1] = new_head_y;
+        rt_thread_mdelay(900);
     }
 }