What happens on the first hidden layer for each neurons

plt.figure(figsize =(10,8))

# First neuron, layer 1
plt.subplot(221)
plt.title('First neuron hidden layer 1')
plt.scatter(result[:, 0], result[:, 1], c= out11.reshape(-1), cmap=cm.coolwarm)
plt.colorbar()
plt.clim(0, 1)

# Second neuron, layer 1
plt.subplot(222)
plt.title('Second neuron hidden layer 1')
plt.scatter(result[:, 0], result[:, 1], c= out12.reshape(-1), cmap=cm.coolwarm)
plt.colorbar()
plt.clim(0, 1)

# Third neuron, layer 1
plt.subplot(223)
plt.title('Third neuron hidden layer 1')
plt.scatter(result[:, 0], result[:, 1], c= out13.reshape(-1), cmap=cm.coolwarm)
plt.colorbar()
plt.clim(0, 1)

# Fourth neuron, layer 1
plt.subplot(224)
plt.title('Fourth neuron hidden layer 1')
plt.scatter(result[:, 0], result[:, 1], c= out14.reshape(-1), cmap=cm.coolwarm)
plt.colorbar()
plt.clim(0, 1)