diff --git a/history/003_trap/src/main/java/com/github/drinkjava2/frog/brain/organ/Eye.java b/history/003_trap/src/main/java/com/github/drinkjava2/frog/brain/organ/Eye.java
new file mode 100644
index 0000000..29d9686
--- /dev/null
+++ b/history/003_trap/src/main/java/com/github/drinkjava2/frog/brain/organ/Eye.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2018 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.brain.organ;
+
+import com.github.drinkjava2.frog.Application;
+import com.github.drinkjava2.frog.Env;
+import com.github.drinkjava2.frog.Frog;
+import com.github.drinkjava2.frog.brain.BrainPicture;
+import com.github.drinkjava2.frog.brain.Cell;
+import com.github.drinkjava2.frog.brain.Input;
+import com.github.drinkjava2.frog.brain.Organ;
+import com.github.drinkjava2.frog.brain.Zone;
+import com.github.drinkjava2.frog.util.RandomUtils;
+
+/**
+ * Eye can only see 4 direction
+ * 
+ * @author Yong Zhu
+ * @since 1.0
+ */
+public class Eye extends Organ {// 这个Eye是老版的眼睛，只能看到四个方向，但它的调节距离会自动随机调整到一个最佳值，这就是随机试错算法的一个应用
+	private static final long serialVersionUID = 1L;
+	public int seeDistance; // 眼睛能看到的距离
+
+	@Override
+	public void initFrog(Frog f) { // 仅在Frog生成时这个方法会调用一次
+		if (!initilized) {
+			initilized = true;
+			organOutputEnergy = 30;
+			seeDistance = 8;
+		}
+	}
+
+	@Override
+	public void drawOnBrainPicture(Frog f, BrainPicture pic) {// 把自已这个器官在脑图上显示出来
+		if (!Application.SHOW_FIRST_FROG_BRAIN)
+			return;
+		super.drawOnBrainPicture(f, pic);
+		float qRadius = r / 4;
+		float q3Radius = (float) (r * .75);
+		Zone seeUp = new Zone(x, y + q3Radius, qRadius);
+		Zone seeDown = new Zone(x, y - q3Radius, qRadius);
+		Zone seeLeft = new Zone(x - q3Radius, y, qRadius);
+		Zone seeRight = new Zone(x + q3Radius, y, qRadius);
+		pic.drawZone(seeUp);
+		pic.drawZone(seeDown);
+		pic.drawZone(seeLeft);
+		pic.drawZone(seeRight);
+	}
+
+	@Override
+	public Organ[] vary() {
+		if (RandomUtils.percent(5)) { // 可视距离有5%的机率变异
+			seeDistance = seeDistance + 1 - 2 * RandomUtils.nextInt(2);
+			if (seeDistance < 1)
+				seeDistance = 1;
+			if (seeDistance > 50)
+				seeDistance = 50;
+		}
+		return new Organ[] { this };
+	}
+
+	@Override
+	public void active(Frog f) {
+		// 第一个眼睛只能观察上、下、左、右四个方向有没有食物
+		float qRadius = r / 4;
+		float q3Radius = (float) (r * .75);
+		Zone seeUp = new Zone(x, y + q3Radius, qRadius);
+		Zone seeDown = new Zone(x, y - q3Radius, qRadius);
+		Zone seeLeft = new Zone(x - q3Radius, y, qRadius);
+		Zone seeRight = new Zone(x + q3Radius, y, qRadius);
+
+		boolean seeSomething = false;
+		boolean atUp = false;
+		boolean atDown = false;
+		boolean atLeft = false;
+		boolean atRight = false;
+
+		for (int i = 1; i < seeDistance; i++)
+			if (Env.foundAnyThing(f.x, f.y + i)) {
+				seeSomething = true;
+				atUp = true;
+				break;
+			}
+
+		for (int i = 1; i < seeDistance; i++)
+			if (Env.foundAnyThing(f.x, f.y - i)) {
+				seeSomething = true;
+				atDown = true;
+				break;
+			}
+
+		for (int i = 1; i < seeDistance; i++)
+			if (Env.foundAnyThing(f.x - i, f.y)) {
+				seeSomething = true;
+				atLeft = true;
+				break;
+			}
+
+		for (int i = 1; i < seeDistance; i++)
+			if (Env.foundAnyThing(f.x + i, f.y)) {
+				seeSomething = true;
+				atRight = true;
+				break;
+			}
+
+		if (seeSomething)
+			for (Cell cell : f.cells) {
+				if (cell.energy < 100)
+					for (Input input : cell.inputs) {
+						if (input.nearby(this)) {
+							if (atUp && input.nearby(seeUp)) {
+								input.cell.energy += organOutputEnergy;
+							}
+							if (atDown && input.nearby(seeDown)) {
+								input.cell.energy += organOutputEnergy;
+							}
+							if (atLeft && input.nearby(seeLeft)) {
+								input.cell.energy += organOutputEnergy;
+							}
+							if (atRight && input.nearby(seeRight)) {
+								input.cell.energy += organOutputEnergy;
+							}
+						}
+					}
+			}
+
+	}
+
+}