В чём ошибка?

import sys
import random
from PyQt6 import QtWidgets, QtGui, QtCore
 
 
class Suprematism(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()
        self.setGeometry(100, 100, 1000, 1000)
        self.setFixedSize(1000, 1000)
        self.setWindowTitle('Супрематизм')
        self.setMouseTracking(True)
        self.shape = None
 
    def paintEvent(self, event):
        painter = QtGui.QPainter(self)
        if self.shape:
            painter.setBrush(self.shape['color'])
            if self.shape['type'] == 'circle':
                painter.drawEllipse(self.shape['center'], self.shape['radius'],
                                    self.shape['radius'])
            elif self.shape['type'] == 'square':
                rect = QtCore.QRectF(self.shape['center'].x() - self.shape['size'] / 2,
                                     self.shape['center'].y() - self.shape['size'] / 2,
                                     self.shape['size'], self.shape['size'])
                painter.drawRect(rect)
            elif self.shape['type'] == 'triangle':
                points = QtGui.QPolygonF(self.shape['points'])
                painter.drawPolygon(points)
 
    def mousePressEvent(self, event):
        if event.button() == QtCore.Qt.MouseButton.LeftButton:
            self.circle(event.position())
        elif event.button() == QtCore.Qt.MouseButton.RightButton:
            self.square(event.position())
        self.update()
 
    def keyPressEvent(self, event):
        if event.key() == QtCore.Qt.Key.Key_Space:
            self.triangle(self.mapFromGlobal(QtGui.QCursor.pos()))
        self.update()
 
    def circle(self, position):
        size = random.randint(20, 100)
        color = QtGui.QColor(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
        self.shape = {'type': 'circle', 'center': position, 'radius': size, 'color': color}
 
    def square(self, position):
        size = random.randint(20, 100)
        color = QtGui.QColor(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
        self.shape = {'type': 'square', 'center': position, 'size': size, 'color': color}
 
    def triangle(self, position):
        radius = random.randint(20, 100)
        height = (3 ** 0.5) * radius / 2
        points = [
            QtCore.QPointF(position.x() - radius / 2, position.y() + height / 3),
            QtCore.QPointF(position.x() + radius / 2, position.y() + height / 3),
            QtCore.QPointF(position.x(), position.y() - (2 * height / 3))
        ]
        color = QtGui.QColor(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
        self.shape = {'type': 'triangle', 'points': points, 'color': color}
 
 
if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    window = Suprematism()
    window.show()
    sys.exit(app.exec())

def draw_triangle(self, qp):
 
        r = random.randrange(20, 101)
        cx = self.x
        cy = self.y
        nea = r * 3 ** 0.5 / 2
        x1 = cx - nea
        y1 = cy + r / 2
 
        x2 = cx + nea
        y2 = cy + r / 2
 
        x3 = cx
        y3 = cy - r
        polygon = QPolygonF([QPointF(x1, y1), QPointF(x2, y2), QPointF(x3, y3)])
        qp.setBrush(self.random_qcolor())
        qp.drawPolygon(polygon)

    def mouseMoveEvent(self, event):
        self.triangle_coord = (event.pos().x(), event.pos().y())
 
    def keyPressEvent(self, event):
        if event.key() == Qt.Key.Key_Space:
            self.whitespace = True
            self.update()
 
   def paintEvent(self, event):
              .............
             if self.whitespace:
                 cx, cy = self.triangle_coord
                 # рисуешь треугольник с этими координатами