def paintEvent(self,event):
		self.painter=QtGui.QPainter(self)
		self.painter.begin(self)
		radx=rady=9
		percep=[random.randint(0,5) for i in range(784)]
		for i in range(16):
			for j in range(49):
				center=Qt.QPoint(4*neuroOff+i*radx*3, neuroOff/2+j*rady*3)
				self.painter.setPen(Qt.QColor(0,0,0))
				if percep[i*16+j]==0:
					self.painter.setBrush(Qt.QColor(255,0,0))
				else:
					self.painter.setBrush(Qt.QColor(0,255,0))
				self.painter.drawEllipse(center, radx, rady)
		self.painter.end()