diff --git a/app/src/main/java/org/ntlab/acanthus_client/entities/Layer.java b/app/src/main/java/org/ntlab/acanthus_client/entities/Layer.java
index 99927bc..702ba20 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/entities/Layer.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/entities/Layer.java
@@ -1,6 +1,23 @@
 package org.ntlab.acanthus_client.entities;
 
+import java.util.ArrayList;
+
 //-----------------------------------------------------------------
 // レイヤー情報
 public class Layer {
+    private ArrayList<Stroke> strokes;
+
+    //-----------------------------------------------------------------
+    // getter
+    public ArrayList<Stroke> getStrokes() {
+        return strokes;
+    }
+
+    //-----------------------------------------------------------------
+    // setter
+    public void setStrokes(ArrayList<Stroke> strokes) {
+        this.strokes = strokes;
+    }
+    //-----------------------------------------------------------------
+
 }
diff --git a/app/src/main/java/org/ntlab/acanthus_client/entities/Page.java b/app/src/main/java/org/ntlab/acanthus_client/entities/Page.java
index 61b4502..baf5612 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/entities/Page.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/entities/Page.java
@@ -3,4 +3,19 @@
 //-----------------------------------------------------------------
 // ページ情報
 public class Page {
+    private Layer layers;
+
+    //-----------------------------------------------------------------
+    // getter
+    public Layer getLayers() {
+        return layers;
+    }
+
+    //-----------------------------------------------------------------
+    // setter
+    public void setLayers(Layer layers) {
+        this.layers = layers;
+    }
+    //-----------------------------------------------------------------
+
 }
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java
index 85121e8..b20240d 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java
@@ -4,6 +4,7 @@
 import org.ntlab.acanthus_client.entities.Stroke;
 
 import java.util.ArrayList;
+import java.util.Collection;
 
 import retrofit2.Call;
 import retrofit2.http.Field;
@@ -19,7 +20,7 @@
     //-----------------------------------------------------------------
     //
     @GET("gallery/{aid}/pageMap/0/layers/0/strokes")
-    Call<ArrayList<Stroke>> getStrokes(@Path("aid") Integer aid);
+    Call<Collection<Stroke>> getStrokes(@Path("aid") Integer aid);
 
     //-----------------------------------------------------------------
     //
@@ -31,7 +32,7 @@
     //-----------------------------------------------------------------
     //
     @GET("gallery/{aid}/pageMap/0/layers/0/strokes/{strokeNo}/position")
-    Call<ArrayList<Position>> getPositions(@Path("aid") Integer aid, @Path("strokeNo") Integer strokeNo);
+    Call<Collection<Position>> getPositions(@Path("aid") Integer aid, @Path("strokeNo") Integer strokeNo);
 
     //-----------------------------------------------------------------
     //
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintViewModel.java b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintViewModel.java
index eccf29b..97da274 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintViewModel.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintViewModel.java
@@ -3,12 +3,21 @@
 import android.graphics.Paint;
 import android.view.View;
 
+import androidx.appcompat.app.AppCompatActivity;
 import androidx.lifecycle.ViewModel;
 
 import org.ntlab.acanthus_client.Acanthus;
+import org.ntlab.acanthus_client.entities.Stroke;
 import org.ntlab.acanthus_client.resources.accounts.LoginRest;
 import org.ntlab.acanthus_client.resources.gallery.StrokesRest;
 
+import java.text.CollationElementIterator;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -20,9 +29,11 @@
 //-----------------------------------------------------------------
 //
 public class PaintViewModel extends ViewModel implements Runnable {
-    private Retrofit retrofit;
     private int currentStrokeNo;
 
+    private Acanthus acanthus;
+    private Retrofit retrofit;
+
     //-----------------------------------------------------------------
     //-----------------------------------------------------------------
     public PaintViewModel() {
@@ -31,6 +42,8 @@
                 .addConverterFactory(ScalarsConverterFactory.create())
                 .addConverterFactory(JacksonConverterFactory.create())
                 .build();
+
+        startObserveChangedStroke();
     }
 
     //-----------------------------------------------------------------
@@ -63,29 +76,31 @@
     }
 
     //-----------------------------------------------------------------
-    //
-    public void getRemoteAnimationInfo() {
+    // 一定間隔でサーバー上の筆跡を取得する
+    public void startObserveChangedStroke() {
+        ScheduledThreadPoolExecutor threadPoolExecutor = new ScheduledThreadPoolExecutor(1);
+        threadPoolExecutor.scheduleWithFixedDelay(this, 1000L, 100L, TimeUnit.MICROSECONDS);
     }
 
     //-----------------------------------------------------------------
-    //
+    // 筆跡取得APIを叩く
     @Override
     public void run() {
-//        final
-//
-//        Call<Integer> call = strokesRest.addPositions(acanthus.getAid(), this.currentStrokeNo, x, y);
-//        call.enqueue(new Callback<Integer>() {
-//            @Override
-//            public void onResponse(Call<Integer> call, Response<Integer> response) {
-//                if (response.isSuccessful()) {
-//                }
-//            }
-//
-//            @Override
-//            public void onFailure(Call<Integer> call, Throwable t) {
-//
-//            }
-//        });
+        final StrokesRest strokesRest = retrofit.create(StrokesRest.class);
+
+        Call<Collection<Stroke>> call = strokesRest.getStrokes(acanthus.getAid());
+        call.enqueue(new Callback<Collection<Stroke>>() {
+            @Override
+            public void onResponse(Call<Collection<Stroke>> call, Response<Collection<Stroke>> response) {
+                if (response.isSuccessful()) {
+                }
+            }
+
+            @Override
+            public void onFailure(Call<Collection<Stroke>> call, Throwable t) {
+
+            }
+        });
     }
 
 }