diff --git a/core.lua b/core.lua
index 476f50d..891e559 100644
--- a/core.lua
+++ b/core.lua
@@ -1,5 +1,6 @@
 -- Websocker: Used for connection between the controle webserver and Units(computers)
-local ws
+Core = {};
+Core.__index = Core;
 
 function Core:connect()
     ws, err = assert(http.websocket("ws://localhost:8080"));
@@ -9,6 +10,8 @@ function Core:connect()
         print(err);
         term.setTextColor(colors.white);
     end
+
+    self.ws = ws;
 end
 
 function Core:send(package)
@@ -16,23 +19,23 @@ function Core:send(package)
         return false, "Missing package";
     end
 
-    if not ws then
+    if not self.ws then
         return false, "Websocket not initiated";
     end
 
-    ws.send(textutils.serialiseJSON(package));
+    self.ws:send(textutils.serialiseJSON(package));
 end
 
 function Core:read()
-    if not ws then
+    if not self.ws then
         return false, "Websocket not initiated";
     end
 
-    return true, textutils.unserialiseJSON(ws.read())
+    return true, textutils.unserialiseJSON(self.ws:read())
 end
 
 function Core:download(file)
-    if not ws then
+    if not self.ws then
         return false, "Websocket not initiated";
     end
 
@@ -60,5 +63,21 @@ function Core:download(file)
 
     local success, data = self:read();
 
+    if not success then
+        return false, "Failed to read: "+data;
+    end
 
+    if not data.type then
+        return false, "Invalid package: "+textutils.serialiseJSON(data);
+    end
+    
+    if not data.type == "FILE_DATA"  then
+        return false, "Invalid type: "+textutils.serialiseJSON(data)
+    end
+
+    local fileStream = io.open(file, "w");
+    fileStream:write(data.fileContent);
+    fileStream:close();
+
+    return true, "Success"
 end
\ No newline at end of file