diff --git a/history/001_first_version/src/main/java/com/github/drinkjava2/frog/env/Env.java b/history/001_first_version/src/main/java/com/github/drinkjava2/frog/env/Env.java
new file mode 100644
index 0000000..089c950
--- /dev/null
+++ b/history/001_first_version/src/main/java/com/github/drinkjava2/frog/env/Env.java
@@ -0,0 +1,123 @@
+package com.github.drinkjava2.frog.env;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Image;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+import javax.swing.JPanel;
+
+import com.github.drinkjava2.frog.Frog;
+import com.github.drinkjava2.frog.egg.Egg;
+import com.github.drinkjava2.frog.util.EggTool;
+
+/**
+ * Env is the living space of frog. draw it on JPanel
+ */
+@SuppressWarnings("serial")
+public class Env extends JPanel {
+	/** Speed of test */
+	public static int SHOW_SPEED =1;
+
+	/** Steps of one test round */
+	public static int STEPS_PER_ROUND = 3000;
+
+	/** Delete eggs at beginning of each run */
+	public static final boolean DELETE_EGGS = true;// 每次运行是否先删除保存的蛋
+	
+	/** Virtual environment x size is 500 pixels */
+	public int ENV_XSIZE = 300;
+
+	/** Virtual environment y size is 500 pixels */
+	public int ENV_YSIZE = 300;
+
+	public byte[][] foods = new byte[ENV_XSIZE][ENV_YSIZE];
+
+	public int FOOD_QTY = 2000; // as name
+
+	public int EGG_QTY =80; // as name
+
+	public List<Frog> frogs = new ArrayList<Frog>();
+	public List<Egg> eggs;
+
+	static {
+		System.out.println("唵缚悉波罗摩尼莎诃!"); // 杀生前先打印往生咒，见码云issue#IW4H8
+		if (DELETE_EGGS)
+			EggTool.deleteEggs();
+	}
+	
+	public Env() {
+		super();
+		this.setLayout(null);// 空布局
+		this.setBounds(100, 100, ENV_XSIZE, ENV_YSIZE);
+	}
+
+	private void rebuildFrogAndFood() {
+		frogs.clear();
+		for (int i = 0; i < ENV_XSIZE; i++) {// clear foods
+			for (int j = 0; j < ENV_YSIZE; j++) {
+				foods[i][j] = 0;
+			}
+		}
+		Random rand = new Random();
+		for (int i = 0; i < eggs.size(); i++) { // 1个Egg生出4个Frog
+			for (int j = 0; j < 4; j++) {
+				frogs.add(new Frog(ENV_XSIZE / 2 + rand.nextInt(90), ENV_YSIZE / 2 + rand.nextInt(90), eggs.get(i)));
+			}
+		}
+		System.out.println("Created "+4*eggs.size() +" frogs");
+		for (int i = 0; i < FOOD_QTY; i++)
+			foods[rand.nextInt(ENV_XSIZE - 3)][rand.nextInt(ENV_YSIZE - 3)] = 1;
+	}
+
+	private void drawFood(Graphics g) {
+		for (int x = 0; x < ENV_XSIZE; x++)
+			for (int y = 0; y < ENV_YSIZE; y++)
+				if (foods[x][y] > 0) {
+					g.fillOval(x, y, 4, 4);
+				}
+	}
+
+	public void run() throws InterruptedException {
+		EggTool.loadEggs(this); // 从磁盘加载egg，或新建一批egg
+		int round = 1;
+		Image buffImg = createImage(this.getWidth(), this.getHeight());
+		Graphics g = buffImg.getGraphics();
+		long t1, t2;
+		do {
+			t1 = System.currentTimeMillis();
+			rebuildFrogAndFood();
+			boolean allDead = false;
+			for (int i = 0; i < STEPS_PER_ROUND; i++) {
+				if (allDead)
+					break;
+				allDead = true;
+				for (Frog frog : frogs) {
+					if (frog.active(this))
+						allDead = false;
+					if (frog.alive && frog.moveCount == 0 && i > 100) {// 如果不移动就死!
+						frog.alive = false;
+					}
+				}
+				if (i % SHOW_SPEED != 0) // 画青蛙会拖慢速度
+					continue;
+				// 开始画青蛙
+				g.setColor(Color.white);
+				g.fillRect(0, 0, this.getWidth(), this.getHeight());
+				g.setColor(Color.BLACK);
+				for (Frog frog : frogs)
+					frog.show(g);
+
+				drawFood(g);
+				Graphics g2 = this.getGraphics();
+				g2.drawImage(buffImg, 0, 0, this);
+				Thread.sleep(10);
+			}
+			EggTool.layEggs(this);
+			t2 = System.currentTimeMillis();
+			Application.mainFrame.setTitle("Frog test round: " + round++ + ", time used: " + (t2 - t1) + " ms");
+		} while (true);
+	}
+}