class exampleNet(nn.Module):
    def __init__(self):
        super().__init__()
        self.layer = torch.nn.Sequential(
            torch.nn.Conv2d(3, 3, 9)

        )
    def forward(self, x):
        x = self.layer(x)
        x = self.layer(x)
        x = self.layer(x)
        x = self.layer(x)
        return x