added async stone detection thread

field.py

@@ -22,9 +22,18 @@ class Field():
             '{:2d} |'.format(i) + ' '.join(row) + '|'
                 for i, row in enumerate(self.state)]) + '\n' + BAR
 
+    def rotate_90_degree_clckwise(matrix):
+        new_matrix = []
+        for i in range(len(matrix[0])):
+            li = list(map(lambda x: x[i], matrix))
+            li.reverse()
+            new_matrix.append(li)
+
+        return new_matrix
 
     def rotate_state(self):
-        self.state = list(zip(*self.state[::-1]))
+        self.state = self.rotate_90_degree_clckwise(self.state)
+        print(self.state)
 
     def get_line_count(self):
         return self.cleared_rows