public void Start()
 {
     actualBrushSelected = 0;
     brushesList         = new List <Brush>();
     // adding default brushes
     AddBrush(DefaultBrushes.GetCircleBrush());
     AddBrush(DefaultBrushes.GetSquareBrush());
     AddBrush(DefaultBrushes.GetTriangleBrush());
     colorPickerEnabled = false;
     eraserEnabled      = false;
     paletteEnabled     = false;
     // importing brushes from resources
     BrushImporter.ImportBrushes(brushesFolder, this);
     uIController.Init();
 }