diff --git a/logs/app.log b/logs/app.log
new file mode 100644
index 00000000..fbfbd3c3
--- /dev/null
+++ b/logs/app.log
@@ -0,0 +1,40 @@
+INFO core.basesyntax.Counter:16  Before decrementing, Thread #  1, counter value 20
+INFO core.basesyntax.Counter:19   After decrementing, Thread #  1, counter value 19
+INFO core.basesyntax.Counter:16  Before decrementing, Thread # 20, counter value 19
+INFO core.basesyntax.Counter:19   After decrementing, Thread # 20, counter value 18
+INFO core.basesyntax.Counter:16  Before decrementing, Thread # 19, counter value 18
+INFO core.basesyntax.Counter:19   After decrementing, Thread # 19, counter value 17
+INFO core.basesyntax.Counter:16  Before decrementing, Thread # 18, counter value 17
+INFO core.basesyntax.Counter:19   After decrementing, Thread # 18, counter value 16
+INFO core.basesyntax.Counter:16  Before decrementing, Thread # 17, counter value 16
+INFO core.basesyntax.Counter:19   After decrementing, Thread # 17, counter value 15
+INFO core.basesyntax.Counter:16  Before decrementing, Thread # 16, counter value 15
+INFO core.basesyntax.Counter:19   After decrementing, Thread # 16, counter value 14
+INFO core.basesyntax.Counter:16  Before decrementing, Thread # 15, counter value 14
+INFO core.basesyntax.Counter:19   After decrementing, Thread # 15, counter value 13
+INFO core.basesyntax.Counter:16  Before decrementing, Thread # 14, counter value 13
+INFO core.basesyntax.Counter:19   After decrementing, Thread # 14, counter value 12
+INFO core.basesyntax.Counter:16  Before decrementing, Thread # 13, counter value 12
+INFO core.basesyntax.Counter:19   After decrementing, Thread # 13, counter value 11
+INFO core.basesyntax.Counter:16  Before decrementing, Thread # 12, counter value 11
+INFO core.basesyntax.Counter:19   After decrementing, Thread # 12, counter value 10
+INFO core.basesyntax.Counter:16  Before decrementing, Thread # 11, counter value 10
+INFO core.basesyntax.Counter:19   After decrementing, Thread # 11, counter value  9
+INFO core.basesyntax.Counter:16  Before decrementing, Thread # 10, counter value  9
+INFO core.basesyntax.Counter:19   After decrementing, Thread # 10, counter value  8
+INFO core.basesyntax.Counter:16  Before decrementing, Thread #  9, counter value  8
+INFO core.basesyntax.Counter:19   After decrementing, Thread #  9, counter value  7
+INFO core.basesyntax.Counter:16  Before decrementing, Thread #  8, counter value  7
+INFO core.basesyntax.Counter:19   After decrementing, Thread #  8, counter value  6
+INFO core.basesyntax.Counter:16  Before decrementing, Thread #  7, counter value  6
+INFO core.basesyntax.Counter:19   After decrementing, Thread #  7, counter value  5
+INFO core.basesyntax.Counter:16  Before decrementing, Thread #  6, counter value  5
+INFO core.basesyntax.Counter:19   After decrementing, Thread #  6, counter value  4
+INFO core.basesyntax.Counter:16  Before decrementing, Thread #  5, counter value  4
+INFO core.basesyntax.Counter:19   After decrementing, Thread #  5, counter value  3
+INFO core.basesyntax.Counter:16  Before decrementing, Thread #  4, counter value  3
+INFO core.basesyntax.Counter:19   After decrementing, Thread #  4, counter value  2
+INFO core.basesyntax.Counter:16  Before decrementing, Thread #  3, counter value  2
+INFO core.basesyntax.Counter:19   After decrementing, Thread #  3, counter value  1
+INFO core.basesyntax.Counter:16  Before decrementing, Thread #  2, counter value  1
+INFO core.basesyntax.Counter:19   After decrementing, Thread #  2, counter value  0
diff --git a/src/main/java/core/basesyntax/MyThread.java b/src/main/java/core/basesyntax/MyThread.java
index e20649e6..4709d397 100644
--- a/src/main/java/core/basesyntax/MyThread.java
+++ b/src/main/java/core/basesyntax/MyThread.java
@@ -10,6 +10,9 @@ public MyThread(Counter counter, String name) {
 
     @Override
     public void run() {
-        counter.decreaseValue();
+        synchronized (counter) {
+            counter.decreaseValue();
+        }
+
     }
 }