diff --git a/src/main/java/JumpGame.java b/src/main/java/JumpGame.java
index 9927138..612856d 100644
--- a/src/main/java/JumpGame.java
+++ b/src/main/java/JumpGame.java
@@ -18,7 +18,6 @@
     //---------------------------------------------------------------
     //
     public void gravity(double y) {
-//           this.time.gravity(y);
         JumpGameModel jumpGameModel = (JumpGameModel) model;
         jumpGameModel.updateGravity(y);
     }
@@ -35,12 +34,22 @@
     // 更新処理
     public void update() {
 
+        JumpGameModel jumpGameModel = (JumpGameModel) model;
+
         // Viewの更新
-        for (IView view : views){
+        for (IView view : views) {
             view.update(model);
             view.display();
         }
 
+        // ステージが排出する地形データを切り替える
+        if (jumpGameModel.isTimingOfChangeTile()) {
+            jumpGameModel.changeTileType();
+
+            TileMapRenderer tileMapRenderer = (TileMapRenderer) views.get(0);
+            tileMapRenderer.createTile(jumpGameModel.getTileType());
+        }
+
         // Modelの更新
         //
         // Space キーのインプット
diff --git a/src/main/java/entities/Time.java b/src/main/java/entities/Time.java
index f08de37..0b96add 100644
--- a/src/main/java/entities/Time.java
+++ b/src/main/java/entities/Time.java
@@ -4,7 +4,7 @@
     private double value;
 
     public void gravity(double y) {
-        this.value = (this.value + 0.01);
+        this.value = (this.value + 1);
     }
 
     public double getValue() {
diff --git a/src/main/java/models/JumpGameModel.java b/src/main/java/models/JumpGameModel.java
index b0617aa..5ea8e35 100644
--- a/src/main/java/models/JumpGameModel.java
+++ b/src/main/java/models/JumpGameModel.java
@@ -3,7 +3,15 @@
 import entities.*;
 import entities.player.*;
 
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.ArrayList;
+import java.util.List;
 
 //---------------------------------------------------------------
 //
@@ -28,7 +36,11 @@
 
     //---------------------------------------------------------------
     private double jumpPower = 32;
+
+    //---------------------------------------------------------------
     private ArrayList<Integer> flagTimings = new ArrayList<>(); // フラグ切り替え
+    private boolean tileType = true;
+    private int flag = 0;
 
     //---------------------------------------------------------------
     //---------------------------------------------------------------
@@ -45,11 +57,17 @@
         time = new Time();
         gameover = new Gameover(position);
         clear = new Clear(position);
+
+        flagTimings = loadText();
     }
 
     //---------------------------------------------------------------
     //---------------------------------------------------------------
     // getter
+    public boolean getTileType() {
+        return tileType;
+    }
+
     public Position getPosition() {
         return position;
     }
@@ -60,13 +78,13 @@
 
     //---------------------------------------------------------------
     //---------------------------------------------------------------
-    //
+    // ジャンプ
     public void jump() {
         this.move.moveY(jumpPower);
     }
 
     //---------------------------------------------------------------
-    //
+    // マイフレーム更新処理
     public void updateGravity(double gravity) {
         this.time.gravity(gravity);
         this.force.gravity(gravity);
@@ -74,4 +92,43 @@
     }
 
     //---------------------------------------------------------------
+    //
+    public boolean isTimingOfChangeTile() {
+        if (time.getValue() <= 0) return false;
+        return (time.getValue() % 32 == 0);
+    }
+
+    //---------------------------------------------------------------
+    // タイルの種類を切り替える
+    public void changeTileType() {
+        if(flagTimings.size() <= flag)return;
+        if (flagTimings.get(flag) % 2 == 0) tileType = !tileType;
+
+        if (flag < flagTimings.size()) flag++;
+    }
+
+    //---------------------------------------------------------------
+    //---------------------------------------------------------------
+    // ステージデータの読み込み
+    private ArrayList<Integer> loadText() {
+        ArrayList<Integer> flagTimings = new ArrayList<>();
+
+        Path file = Paths.get("resources/stage.txt");
+        String[] data = new String[1];
+
+        try {
+            List<String> lines = Files.readAllLines(file, Charset.forName("Shift-JIS"));
+            for (int i = 0; i < lines.size(); i++) data = lines.get(i).split(",");
+
+            for (int i = 0; i < data.length; i++) flagTimings.add(Integer.parseInt(data[i]));
+
+        } catch (IOException e) {
+            System.out.println("Failed to load stage.txt");
+        }
+
+        return flagTimings;
+    }
+
+
+    //---------------------------------------------------------------
 }
diff --git a/src/main/java/views/TileMapRenderer.java b/src/main/java/views/TileMapRenderer.java
index 71aff43..eca13d2 100644
--- a/src/main/java/views/TileMapRenderer.java
+++ b/src/main/java/views/TileMapRenderer.java
@@ -14,7 +14,6 @@
     private double offsetY = 256d;
     private TileRenderer newTile = new TileRenderer("resources/tile.png", null, 2);
     private ArrayList<TileRenderer> tiles = new ArrayList<>();
-    private int tileLen = 150; //
 
     //---------------------------------------------------------------
     //---------------------------------------------------------------
@@ -49,8 +48,7 @@
     //---------------------------------------------------------------
     // 初期タイル作成
     private void initTiles() {
-
-        for (int i = 0; i < tileLen; i++) {
+        for (int i = 0; i < 20; i++) {
             double x = 32 * newTile.getScaleValue() * i;
 
             newTile = new TileRenderer("resources/tile.png", new Pair<>(x, offsetY));
@@ -61,20 +59,16 @@
 
     //--------------------------------------------------------------
     // タイルをフラグに応じて生成する
-    private void createTile(TileType tileType) {
+    public void createTile(boolean tileType) {
 
-        switch (tileType) {
-            case CLOSE:
-                newTile = new TileRenderer("resources/tile.png", new Pair<>((double) GLConfigVariable.WIDTH, 0d), 2);
-                break;
-
-            case OPEN:
-                newTile = new TileRenderer("resources/hole.png", new Pair<>((double) GLConfigVariable.WIDTH, 0d), 2);
-                break;
-        }
+        if (tileType)
+            newTile = new TileRenderer("resources/tile.png", new Pair<>((double) GLConfigVariable.WIDTH, offsetY), 2);
+        else
+            newTile = new TileRenderer("resources/hole.png", new Pair<>((double) GLConfigVariable.WIDTH, offsetY), 2);
 
         tiles.add(newTile);
+        System.out.println("New tile created.");
     }
 
-    //---------------------------------------------------------------
+//---------------------------------------------------------------
 }
\ No newline at end of file