small pattern and fix circle arc

grid/ui/window.py

@@ -10,7 +10,7 @@ from PySide6.QtWidgets import (
     QWidget,
 )
 
-from grid.ui.pattern import Pattern
+from grid.ui.pattern import LargeUltimaPattern, SmallZPattern
 
 
 class Window(QWidget):
@@ -21,14 +21,10 @@ class Window(QWidget):
 
         self.scene = QGraphicsScene(0, 0, 400, 400)
 
-        pp1 = Pattern(0, 0)
-        pp2 = Pattern(401, 0)
-        pp3 = Pattern(0, 401)
-        pp4 = Pattern(401, 401)
+        pp1 = LargeUltimaPattern(0, 0)
+        pp2 = SmallZPattern(401, 0)
         self.scene.addItem(pp1)
         self.scene.addItem(pp2)
-        self.scene.addItem(pp3)
-        self.scene.addItem(pp4)
 
         view = QGraphicsView(self.scene)
         view.setRenderHint(QPainter.RenderHint.Antialiasing)