diff --git a/auto_diff/auto_diff.py b/auto_diff/auto_diff.py
index 4484b94..ed069bb 100644
--- a/auto_diff/auto_diff.py
+++ b/auto_diff/auto_diff.py
@@ -133,6 +133,9 @@ def backward(loss: Node):
 	for node in reversed(topo):
 		node._backward()
 
+def update_weights(weight: Node, lr: float):
+	return Node(float(weight) - lr * weight.grad)
+
 if __name__ == "__main__":
 
 	x = Node(2, label="x")
diff --git a/classes.py b/classes.py
index 2ab3995..5b0c38b 100644
--- a/classes.py
+++ b/classes.py
@@ -1,4 +1,6 @@
+import copy
 import random
+from auto_diff import auto_diff
 
 class DataSet:
 	def __init__(self, func, N=1000) -> None:
@@ -7,12 +9,97 @@ class DataSet:
 		self.test = []
 		self.test_answs = []
 
-		for i in range(N//5*4):
-			x = random.uniform(1, 9)
-			self.train.append(x)
-			self.train_answs.append(func(x))
+		def gen_data():
+			x1 = random.uniform(-1, 1)
+			x2 = random.uniform(-1, 1)
+			y = func(x1, x2)
+			return (x1, x2), y
+
+		for i in range(N):
+			(x1, x2), y = gen_data()
+			self.train.append((x1, x2))
+			self.train_answs.append(y)
 
 		for i in range(N//5):
-			x = random.uniform(1, 9)
-			self.test.append(x)
-			self.test_answs.append(func(x))
\ No newline at end of file
+			(x1, x2), y = gen_data()
+			self.test.append((x1, x2))
+			self.test_answs.append(y)
+
+
+	def __repr__(self):
+		return f"test: {self.test}\nansws: {self.test_answs}"
+	
+
+class Neuron:
+	def __init__(self, weights_num: int) -> None:
+		self.weights = [auto_diff.Node(random.uniform(-1, 1)) for _ in range(weights_num)]
+		self.b = auto_diff.Node(random.uniform(-1, 1))
+
+	def __repr__(self, debug: bool = False) -> str:
+		if not debug:
+			return f"<weights = {len(self.weights)} b = {float(self.b)}>"
+		else:
+			return f"<weights = {self.weights} b = {float(self.b)}>"
+		
+	def update_weights(self, lr):
+		for i in range(len(self.weights)):
+			self.weights[i] = auto_diff.update_weights(self.weights[i], lr)
+
+		self.b = auto_diff.update_weights(self.b, lr)
+
+def my_sum(array: list) -> int:
+	result = 0
+	for i in array:
+		result += i
+	return result
+
+class NeuronNetwork:
+	def __init__(self, neurons_num: int, layers_num: int, inputs_num: int, outputs_num: int = 1) -> None:
+		'''
+		neurons_num: количество нейронов на каждом слое\n
+		layers_num: количество слоёв\n
+		inputs_num: количество входных нейронов\n
+		outputs_num: количество выходных нейронов (по умолчанию 1)\n
+		'''
+		neurons = []
+		for layer in range(layers_num+1):
+			neurons.append([])
+
+			if layer == layers_num:
+				for neuron in range(outputs_num):
+					neurons[layer].append(Neuron(neurons_num))
+				continue
+
+			for neuron in range(neurons_num):
+				if layer == 0:
+					neurons[layer].append(Neuron(inputs_num))
+				else:
+					neurons[layer].append(Neuron(neurons_num))
+		
+		self.neurons = neurons
+
+	def forward(self, func, *args, func_out=None):
+		if func_out is None:
+			func_out = func
+
+
+		prev_out = [*args]
+		out = []
+		for layer in self.neurons[:-1]:
+			for neuron in layer:
+				out.append(func(my_sum([prev_out[i]*neuron.weights[i] for i in range(len(prev_out))]) + neuron.b))
+			prev_out = copy.deepcopy(out)
+			out = []
+
+		for neuron in self.neurons[-1]:
+			out.append(func_out(my_sum([prev_out[i]*neuron.weights[i] for i in range(len(prev_out))]) + neuron.b))
+		
+		return out[0]
+
+	def update_weights(self, lr=0.1):
+		for i in range(len(self.neurons)):
+			for j in range(len(self.neurons[i])):
+				self.neurons[i][j].update_weights(lr)
+
+if __name__ == "__main__":
+	print(NeuronNetwork(4, 4, 2).neurons)
\ No newline at end of file
diff --git a/generate.py b/generate.py
index 9640de2..f4b6507 100644
--- a/generate.py
+++ b/generate.py
@@ -1,7 +1,7 @@
 import classes
 
-def generate_dataset(N=1000):
-	return classes.DataSet(lambda x: 1*x-12, N)
+def generate_dataset(N=100):
+	return classes.DataSet(lambda x, y: float(((x**2 + y**2)**0.5)>=0.5), N)
 
 if __name__ == "__main__":
-	print([[i.train, i.train_answs] for i in [generate_dataset(10)]])
\ No newline at end of file
+	print(generate_dataset(10))
\ No newline at end of file
diff --git a/main.py b/main.py
index 0cfce63..546c399 100644
--- a/main.py
+++ b/main.py
@@ -9,12 +9,16 @@ dataset = generate.generate_dataset(100)
 
 # Создаём и обучаем сеть
 nn = neuro_defs.SimpleNN()
-nn.train(dataset.train, dataset.train_answs, epochs=100)
+epoch = 100
+for i in range(epoch):
+	nn.train(dataset.train, dataset.train_answs, epochs=1)
+
+	if epoch % 10 == 0:
+		print("*"*(i//10) + "-"*((epoch-i)//10))
 
 # Проверяем на новой точке
 for dot in range(len(dataset.test)):
-	print(nn.forward(dataset.test[dot]).val, dataset.test_answs[dot])
+	print(nn.forward(*dataset.test[dot]).val, dataset.test_answs[dot])
 print()
-print(nn.w_out.val, nn.b_out.val)
 # visual.plot_dataset(dataset)
 # visual.plt_show()
\ No newline at end of file
diff --git a/neuro_defs.py b/neuro_defs.py
index 5473c0f..f82edb2 100644
--- a/neuro_defs.py
+++ b/neuro_defs.py
@@ -1,32 +1,86 @@
-import math
-import random
-from auto_diff import auto_diff
 
-def func_active(x):
-	return
+from auto_diff import auto_diff
+import classes
+
+def sigmoid(x: auto_diff.Node):
+    return 1 / (1 + (-x).exp())
+
+def tanh(x: auto_diff.Node):
+	return (x.exp() - (-x).exp()) / (x.exp() + (-x).exp())
 
 class SimpleNN:
 	def __init__(self):
-		self.w_out = auto_diff.Node(random.uniform(-1, 1), label="w_out")
-		self.b_out = auto_diff.Node(random.uniform(-1, 1), label="b_out")
-		self.lr = 0.02   # скорость обучения
+		#111 - 1 слой, 1 нейрон, 1 вес
+		# self.w111 = auto_diff.Node(random.uniform(-1, 1))
+		# self.w112 = auto_diff.Node(random.uniform(-1, 1))
+		# self.b11 = auto_diff.Node(random.uniform(-1, 1))
 
-	def forward(self, x):
+		# self.w121 = auto_diff.Node(random.uniform(-1, 1))
+		# self.w122 = auto_diff.Node(random.uniform(-1, 1))
+		# self.b12 = auto_diff.Node(random.uniform(-1, 1))
+
+		# self.w131 = auto_diff.Node(random.uniform(-1, 1))
+		# self.w132 = auto_diff.Node(random.uniform(-1, 1))
+		# self.b13 = auto_diff.Node(random.uniform(-1, 1))
+
+		# self.w141 = auto_diff.Node(random.uniform(-1, 1))
+		# self.w142 = auto_diff.Node(random.uniform(-1, 1))
+		# self.b14 = auto_diff.Node(random.uniform(-1, 1))
+
+
+
+		# self.w211 = auto_diff.Node(random.uniform(-1, 1))
+		# self.w212 = auto_diff.Node(random.uniform(-1, 1))
+		# self.w213 = auto_diff.Node(random.uniform(-1, 1))
+		# self.w214 = auto_diff.Node(random.uniform(-1, 1))
+		# self.b21 = auto_diff.Node(random.uniform(-1, 1))
+
+		# self.w221 = auto_diff.Node(random.uniform(-1, 1))
+		# self.w222 = auto_diff.Node(random.uniform(-1, 1))
+		# self.w223 = auto_diff.Node(random.uniform(-1, 1))
+		# self.w224 = auto_diff.Node(random.uniform(-1, 1))
+		# self.b22 = auto_diff.Node(random.uniform(-1, 1))
+
+
+
+		# self.w1_out = auto_diff.Node(random.uniform(-1, 1))
+		# self.w2_out = auto_diff.Node(random.uniform(-1, 1))
+		# self.b_out = auto_diff.Node(random.uniform(-1, 1))
+
+		self.network = classes.NeuronNetwork(4, 2, 2)
+
+		self.lr = 0.1   # скорость обучения
+
+	def forward(self, x1, x2):
 		# прямой проход
-		self.z1 = self.w_out * x + self.b_out
-		return self.z1
 
-	def backward(self, x, y):
+		# #скрытые слои
+		# self.h11 = tanh(self.w111*x1 + self.w112*x2 + self.b11)
+		# self.h12 = tanh(self.w121*x1 + self.w122*x2 + self.b12)
+		# self.h13 = tanh(self.w131*x1 + self.w132*x2 + self.b13)
+		# self.h14 = tanh(self.w141*x1 + self.w142*x2 + self.b14)
+
+		# self.h21 = tanh(self.w211*self.h11 + self.w212*self.h12 + self.w213*self.h13 + self.w214*self.h14 + self.b21)
+		# self.h22 = tanh(self.w221*self.h11 + self.w222*self.h12 + self.w223*self.h13 + self.w224*self.h14 + self.b22)
+
+		# #выходной слой
+		# self.a1 = sigmoid(self.w1_out*self.h21 + self.w2_out*self.h22 + self.b_out)
+
+		self.a1 = self.network.forward(sigmoid, x1, x2)
+
+		return self.a1
+
+	def backward(self, y):
 		# вычисляем ошибку
-		error = (self.z1 - y)**2  # dL/da2
+		error = (self.a1 - y)**2  # dL/da2
 
 		auto_diff.backward(error)
-		self.w_out = auto_diff.Node(float(self.w_out) - self.lr * self.w_out.grad, label="w_out")
-		self.b_out = auto_diff.Node(float(self.b_out) - self.lr * self.b_out.grad, label="b_out")
+
+		self.network.update_weights(self.lr)
 
 	def train(self, dataset, answs, epochs=1000):
 		for _ in range(epochs):
 			for i in range(len(dataset)):
-				self.forward(dataset[i])
-				self.backward(dataset[i], answs[i])
+				self.forward(*dataset[i])
+				self.backward(answs[i])