diff --git a/history/003_trap/src/main/java/com/github/drinkjava2/frog/objects/Object.java b/history/003_trap/src/main/java/com/github/drinkjava2/frog/objects/Object.java
new file mode 100644
index 0000000..daa3160
--- /dev/null
+++ b/history/003_trap/src/main/java/com/github/drinkjava2/frog/objects/Object.java
@@ -0,0 +1,26 @@
+/* Copyright 2018-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by
+ * applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
+ * OF ANY KIND, either express or implied. See the License for the specific
+ * language governing permissions and limitations under the License.
+ */
+package com.github.drinkjava2.frog.objects;
+
+/**
+ * Object means some thing in Env
+ * 
+ * @author Yong Zhu
+ * @since 1.0
+ */
+public interface Object {
+
+	public void build();
+
+	public void destory();
+
+	public void active(int screen);
+}