diff --git a/backend/routes.py b/backend/routes.py
index f6b6538..fcb1aaa 100644
--- a/backend/routes.py
+++ b/backend/routes.py
@@ -11,7 +11,6 @@
 # RETURN HEALTH OF THE APP
 ######################################################################
 
-
 @app.route("/health")
 def health():
     return jsonify(dict(status="OK")), 200
@@ -35,7 +34,7 @@ def count():
 ######################################################################
 @app.route("/picture", methods=["GET"])
 def get_pictures():
-    pass
+    return jsonify(data)
 
 ######################################################################
 # GET A PICTURE
@@ -44,7 +43,10 @@ def get_pictures():
 
 @app.route("/picture/<int:id>", methods=["GET"])
 def get_picture_by_id(id):
-    pass
+    for picture in data:
+        if picture["id"] == id:
+            return picture
+    return {"message": "picture not found"}, 404
 
 
 ######################################################################
@@ -52,7 +54,17 @@ def get_picture_by_id(id):
 ######################################################################
 @app.route("/picture", methods=["POST"])
 def create_picture():
-    pass
+    # get data from the json body
+    picture_in = request.json
+    print(picture_in)
+    # if the id is already there, return 303 with the URL for the resource
+    for picture in data:
+        if picture_in["id"] == picture["id"]:
+            return {
+                "Message": f"picture with id {picture_in['id']} already present"
+            }, 302
+    data.append(picture_in)
+    return picture_in, 201
 
 ######################################################################
 # UPDATE A PICTURE
@@ -61,11 +73,21 @@ def create_picture():
 
 @app.route("/picture/<int:id>", methods=["PUT"])
 def update_picture(id):
-    pass
+    # get data from the json body
+    picture_in = request.json
+    for index, picture in enumerate(data):
+        if picture["id"] == id:
+            data[index] = picture_in
+            return picture, 201
+    return {"message": "picture not found"}, 404
 
 ######################################################################
 # DELETE A PICTURE
 ######################################################################
 @app.route("/picture/<int:id>", methods=["DELETE"])
 def delete_picture(id):
-    pass
+    for picture in data:
+        if picture["id"] == id:
+            data.remove(picture)
+            return "", 204
+    return {"message": "picture not found"}, 404