diff --git a/java_console/models/src/com/rusefi/stream/LogicdataStreamFileSandbox.java b/java_console/models/src/com/rusefi/stream/LogicdataStreamFileSandbox.java
new file mode 100644
index 0000000000..30295320e6
--- /dev/null
+++ b/java_console/models/src/com/rusefi/stream/LogicdataStreamFileSandbox.java
@@ -0,0 +1,19 @@
+package com.rusefi.stream;
+
+import com.rusefi.composite.CompositeEvent;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class LogicdataStreamFileSandbox {
+    public static void main(String[] args) {
+        List<CompositeEvent> events = new ArrayList<>();
+        events.add(new CompositeEvent(10, false, false, false, false, false, false));
+        events.add(new CompositeEvent(20, true, false, true, false, false, false));
+        events.add(new CompositeEvent(30, false, false, false, false, false, false));
+
+        LogicdataStreamFile file = new LogicdataStreamFile("sandbox.logicdata");
+        file.append(events);
+        file.close();
+    }
+}