diff --git a/history/006_snake/src/main/java/com/gitee/drinkjava2/frog/objects/Material.java b/history/006_snake/src/main/java/com/gitee/drinkjava2/frog/objects/Material.java
new file mode 100644
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+++ b/history/006_snake/src/main/java/com/gitee/drinkjava2/frog/objects/Material.java
@@ -0,0 +1,57 @@
+/* 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.gitee.drinkjava2.frog.objects;
+
+import java.awt.Color;
+
+/**
+ * Material store material types
+ * 
+ * 小于等于16384的位数用来标记青蛙序号，可利用Env.frogs.get(no-1)快速定位青蛙，其它各种材料用整数中其它位来表示
+ * 
+ * @author Yong Zhu
+ * @since 1.0
+ */
+public class Material {// NOSONAR
+
+	public static final int FROG_TAG = 0b11111111111111; // 16383 小于等于16384的位数用来标记青蛙序号，可利用Env.frogs.get(no-1)快速定位青蛙
+
+	private static int origin = FROG_TAG + 1; // 大于16384用来作为各种材料的标记
+
+	private static int nextLeftShift() {// 每次将origin左移1位
+		origin = origin << 1;
+		if (origin < 0)
+			throw new IllegalArgumentException("Material out of maximum range");
+		return origin;
+	}
+
+	public static final int FOOD = nextLeftShift();
+	public static final int FLY1 = nextLeftShift();// FLY1苍蝇是一种会移动的Food
+	public static final int FLY2 = nextLeftShift();// FLY2苍蝇是一种会移动的Food
+	public static final int FLY3 = nextLeftShift();// FLY3苍蝇是一种会移动的Food
+	public static final int FLY4 = nextLeftShift();// FLY4苍蝇是一种会移动的Food
+	public static final int ANY_FOOD = FOOD + FLY1 + FLY2 + FLY3 + FLY4;// ANY_FOOD是几种FOOD的位叠加
+
+	public static final int SNAKE = nextLeftShift(); // 蛇的图形
+	public static final int KILL_ANIMAL = nextLeftShift(); // if>=KILLFROG will kill animal
+	public static final int BRICK = nextLeftShift();// brick will kill frog
+	public static final int TRAP = nextLeftShift(); // trap will kill frog
+
+	// 大于INVISIBLE的材料不显示在环境里，但有可能被青蛙或蛇看到，这是为了简化模式识别，蛇显示为蛇图形，但实际上目前它在环境中用一根线条来代表，以简化模型
+
+	public static Color color(int material) {
+		if ((material & TRAP) > 0)
+			return Color.LIGHT_GRAY;
+		else
+			return Color.BLACK;
+	}
+
+}