diff --git a/src/neural_network.py b/src/neural_network.py
new file mode 100644
index 0000000..7643357
--- /dev/null
+++ b/src/neural_network.py
@@ -0,0 +1,30 @@
+from layer import Layer
+import numpy as np
+from abc import ABC, abstractmethod
+
+
+class NeuralNetwork(ABC):
+    @property
+    @abstractmethod
+    def layers(self) -> list[Layer]:
+        pass
+
+    @abstractmethod
+    def forward(self, x: np.ndarray) -> np.ndarray:
+        pass
+
+
+class SequentialNetwork:
+    __layers: list[Layer]
+
+    def __init__(self, layers: list[Layer]):
+        self.__layers = layers
+
+    def forward(self, x: np.ndarray) -> np.ndarray:
+        for layer in self.__layers:
+            x = layer.forward(x)
+        return x
+
+    @property
+    def layers(self) -> list[Layer]:
+        return self.__layers