diff --git a/src/main/java/com/ntlab/irisserver/entities/Card.java b/src/main/java/com/ntlab/irisserver/entities/Card.java
new file mode 100644
index 0000000..2ad0169
--- /dev/null
+++ b/src/main/java/com/ntlab/irisserver/entities/Card.java
@@ -0,0 +1,16 @@
+package com.ntlab.irisserver.entities;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class Card {
+
+    @JsonProperty("isOpen")
+    public boolean isOpen;
+
+    @JsonProperty("color")
+    public String color;
+
+    @JsonProperty("dno")
+    public int dno;
+
+}
diff --git a/src/main/java/com/ntlab/irisserver/entities/Room.java b/src/main/java/com/ntlab/irisserver/entities/Room.java
index 7c59ca4..cfaa6bf 100644
--- a/src/main/java/com/ntlab/irisserver/entities/Room.java
+++ b/src/main/java/com/ntlab/irisserver/entities/Room.java
@@ -165,4 +165,12 @@
                 return state;
         }
 
+        public void changeState(){
+                state += 1;
+        }
+
+        public void resetState(){
+                state = 0;
+        }
+
 }
diff --git a/src/main/java/com/ntlab/irisserver/resources/GameStateRest.java b/src/main/java/com/ntlab/irisserver/resources/GameStateRest.java
index 171556a..894bcc9 100644
--- a/src/main/java/com/ntlab/irisserver/resources/GameStateRest.java
+++ b/src/main/java/com/ntlab/irisserver/resources/GameStateRest.java
@@ -1,4 +1,12 @@
 package com.ntlab.irisserver.resources;
 
+import org.springframework.stereotype.Component;
+
+import javax.ws.rs.Path;
+
+@Component
+@Path("/rooms")
+
 public class GameStateRest {
+
 }