diff --git a/QElephant/Circuit.py b/QElephant/Circuit.py
index 6bb67e6..c1f2b30 100644
--- a/QElephant/Circuit.py
+++ b/QElephant/Circuit.py
@@ -59,6 +59,9 @@ class Circuit:
                         self.__line((i+1, q_i-0.25), (i+1, q_i+0.25))
                         self.__circle(i+1, neigbhor[0], 0.05)
                         self.__line((i+1, q_i), (i+1, neigbhor[0]))
+                    elif txt == "obs":
+                        self.__circle(i+1, q_i, 0.25, False)
+                        self.__circle(i+1, q_i, 0.05)
                     else:
                         self.__rect(i+1, q_i, txt, n)
                         for neig in neigbhor:
diff --git a/QElephant/QuBit.py b/QElephant/QuBit.py
index 7b25709..cf4cce8 100644
--- a/QElephant/QuBit.py
+++ b/QElephant/QuBit.py
@@ -295,6 +295,7 @@ class IQuBit(QuBit):
     
     def observe(self) -> int:
         r = rd.random()
+        self.__muBit._MuBit__emit("obs", self.__n, [])
         if r < self.__muBit._MuBit__getProb(self.__n):
             self.__muBit._MuBit__set(self.__n, 0)
             return 0