diff --git a/main.py b/main.py
index 7b66001..cd5b025 100644
--- a/main.py
+++ b/main.py
@@ -1,9 +1,8 @@
 import os, sys
-import time
 if 'SUMO_HOME' in os.environ:
     tools = os.path.join(os.environ['SUMO_HOME'], 'tools')
     sys.path.append(tools)
-else:   
+else:
     print("please declare environment variable 'SUMO_HOME'")
 
 from PySide6.QtCore import Qt, QTimer
@@ -15,7 +14,7 @@ from mainLoop import mainLoop
 
 class MainWindow(QMainWindow):
     def __init__(self):
-        super(MainWindow, self).__init__()
+        super().__init__()
         self.ui = Ui_MainWindow()
         self.ui.setupUi(self)
 
@@ -30,16 +29,16 @@ class MainWindow(QMainWindow):
         openNet.setStatusTip("Open Network file (.net.xml)")
         openNet.triggered.connect(self.mainLoop.openNetwork)
         openMenu.addAction(openNet)
-        
+
         openVeh = QAction("&Open Vehicles",self)
         openVeh.setStatusTip("Open Vehicle description (.rou.xml)")
         openVeh.triggered.connect(self.mainLoop.openVehicles)
         openMenu.addAction(openVeh)
 
         timer = QTimer(self)
-        timer.timeout.connect(self.mainLoop.update)
+        timer.timeout.connect(self.ui.mainSurf.update)
         timer.start(1.0/60)
-    
+
     def keyPressEvent(self, e):
         if e.key() == Qt.Key_Escape or e.key() == Qt.Key_Q:
             self.close()
@@ -49,13 +48,13 @@ class MainWindow(QMainWindow):
 
 if __name__ == "__main__":
     app = QApplication()
-   
-    format = QSurfaceFormat()
-    format.setDepthBufferSize(24)
-    format.setVersion(3, 2)
-    format.setSamples(4)
-    format.setProfile(QSurfaceFormat.CoreProfile)
-    QSurfaceFormat.setDefaultFormat(format)
+
+    f = QSurfaceFormat()
+    f.setDepthBufferSize(24)
+    f.setVersion(3, 2)
+    f.setSamples(4)
+    f.setProfile(QSurfaceFormat.CoreProfile)
+    QSurfaceFormat.setDefaultFormat(f)
 
     window = MainWindow()
     window.show()
diff --git a/mainLoop.py b/mainLoop.py
index bb5021f..4fd56ae 100644
--- a/mainLoop.py
+++ b/mainLoop.py
@@ -10,19 +10,18 @@ class mainLoop():
         self.painter = parent.ui.mainSurf
 
         self.map = Map()
-        
+
         self.controller = CarController(self.map)
-        
+
         self.painter.addMap(self.map)
         self.painter.addCarController(self.controller)
 
     def update(self):
         self.controller.update()
-        self.painter.update()
 
     def openNetwork(self):
         fileName = QFileDialog.getOpenFileName(self.parent,"Open Network", "./", "Network File (*.net.xml)")
-        if(fileName[0] == ''):
+        if fileName[0] == '':
             return
         self.map.fromPath(fileName[0])
         self.painter.generateTransform()
@@ -31,10 +30,10 @@ class mainLoop():
 
     def openVehicles(self):
         fileName = QFileDialog.getOpenFileName(self.parent,"Open Vehicle trip description", "./", "Route File (*.rou.xml)")
-        if(fileName[0] == ''):
+        if fileName[0] == '':
             return
         self.controller.fromPath(fileName[0])
-        if(self.map.isLoaded()):
+        if self.map.isLoaded():
             self.controller.prepareRoute()
 
     def quickLoad(self):