diff --git a/simulation/VirtualLedBoard/mainwindow.cpp b/simulation/VirtualLedBoard/mainwindow.cpp
index 4593d7c..b99fbab 100644
--- a/simulation/VirtualLedBoard/mainwindow.cpp
+++ b/simulation/VirtualLedBoard/mainwindow.cpp
@@ -12,6 +12,7 @@ MainWindow::MainWindow(QWidget *parent)
 {
     ui->setupUi(this);
     this->mOffscreenPanel = new QImage(DEFAULT_WIDTH + LED_DISTANCE, DEFAULT_HEIGHT + LED_DISTANCE, QImage::Format_RGB32);
+    this->drawImage(this->mOffscreenPanel);
     this->server = new UdpLedServer (NULL, this);
 }
 
@@ -21,12 +22,10 @@ MainWindow::~MainWindow()
 }
 
 void MainWindow::drawImage(QImage *target) {
+    this->mScene=new QGraphicsScene() ;
     QGraphicsView *graphicsView = new QGraphicsView();
     graphicsView->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
-    QGraphicsScene* scene=new QGraphicsScene() ;
-    graphicsView->setScene(scene);
-    QGraphicsPixmapItem* item = new QGraphicsPixmapItem(QPixmap::fromImage(*(target)));
-    scene->addItem(item);
+    graphicsView->setScene(this->mScene);
     graphicsView->show();
     this->ui->ledPanel->addWidget(graphicsView);
 }
@@ -42,7 +41,10 @@ void MainWindow::setLED(uint8_t x, uint8_t y) {
 }
 
 void MainWindow::updatePanel(void) {
-    this->drawImage(this->mOffscreenPanel);
+
+    QGraphicsPixmapItem* item = new QGraphicsPixmapItem(QPixmap::fromImage(*(this->mOffscreenPanel)));
+    this->mScene->clear();
+    mScene->addItem(item);
     this->renderPanel();
 }
 
diff --git a/simulation/VirtualLedBoard/mainwindow.h b/simulation/VirtualLedBoard/mainwindow.h
index 0b0617a..d32b5f4 100644
--- a/simulation/VirtualLedBoard/mainwindow.h
+++ b/simulation/VirtualLedBoard/mainwindow.h
@@ -3,6 +3,7 @@
 
 #include <QMainWindow>
 #include <QImage>
+#include <QGraphicsScene>
 #include "udpserver.h"
 
 #include "settings.h"
@@ -31,8 +32,9 @@ public slots:
 
 private:
     Ui::MainWindow *ui;
-    UdpLedServer *server;
-    QImage       *mOffscreenPanel;
+    UdpLedServer *server            = nullptr;
+    QImage       *mOffscreenPanel   = nullptr;
+    QGraphicsScene* mScene          = nullptr;
     void drawImage(QImage *image);
     void renderPanel(void);
 };
diff --git a/simulation/VirtualLedBoard/udpserver.cpp b/simulation/VirtualLedBoard/udpserver.cpp
index 8404ffc..0acdf06 100644
--- a/simulation/VirtualLedBoard/udpserver.cpp
+++ b/simulation/VirtualLedBoard/udpserver.cpp
@@ -53,8 +53,8 @@ void UdpLedServer::processTheDatagram(QNetworkDatagram datagram) {
         int currentIndex = PACKET_INDEX_PANEL0;
 
         uint16_t mask = 1;
-        for(int x=0; x < (PANEL_WIDTH * MAXIMUM_PANELSIZE); x++) {
-            for(int y=0; y < PANEL_HEIGHT; y++) {
+        for(int y=0; y < PANEL_HEIGHT; y++) {
+            for(int x=0; x < (PANEL_WIDTH * MAXIMUM_PANELSIZE); x++) {
                 if (datagram.data().at(currentIndex) & mask) {
                     this->changeLEDstate(x, y);
                     qDebug() << x << "x" << y << " set";