diff --git a/_img/0-welcome/graph-run.png b/_img/0-welcome/graph-run.png
index 1fe4e2b..0b13f83 100644
Binary files a/_img/0-welcome/graph-run.png and b/_img/0-welcome/graph-run.png differ
diff --git a/_img/1-basics/basic_math_operations/graph-run.png b/_img/1-basics/basic_math_operations/graph-run.png
index 1fe4e2b..0b13f83 100644
Binary files a/_img/1-basics/basic_math_operations/graph-run.png and b/_img/1-basics/basic_math_operations/graph-run.png differ
diff --git a/_img/2-basics_in_machine_learning/linear_regression/updating_model.gif b/_img/2-basics_in_machine_learning/linear_regression/updating_model.gif
index a6eeb72..84305b1 100644
Binary files a/_img/2-basics_in_machine_learning/linear_regression/updating_model.gif and b/_img/2-basics_in_machine_learning/linear_regression/updating_model.gif differ
diff --git a/_img/3-neural_network/convolutiona_neural_network/accuracy_train.png b/_img/3-neural_network/convolutiona_neural_network/accuracy_train.png
index df7b74f..91b2007 100644
Binary files a/_img/3-neural_network/convolutiona_neural_network/accuracy_train.png and b/_img/3-neural_network/convolutiona_neural_network/accuracy_train.png differ
diff --git a/_img/3-neural_network/convolutiona_neural_network/activation_fc4_train.png b/_img/3-neural_network/convolutiona_neural_network/activation_fc4_train.png
index 4d82e20..d4917e2 100644
Binary files a/_img/3-neural_network/convolutiona_neural_network/activation_fc4_train.png and b/_img/3-neural_network/convolutiona_neural_network/activation_fc4_train.png differ
diff --git a/_img/3-neural_network/convolutiona_neural_network/architecture.png b/_img/3-neural_network/convolutiona_neural_network/architecture.png
index 990ffc7..87a9772 100644
Binary files a/_img/3-neural_network/convolutiona_neural_network/architecture.png and b/_img/3-neural_network/convolutiona_neural_network/architecture.png differ
diff --git a/_img/3-neural_network/convolutiona_neural_network/classifier_image.png b/_img/3-neural_network/convolutiona_neural_network/classifier_image.png
index c5f00e3..1e060d5 100644
Binary files a/_img/3-neural_network/convolutiona_neural_network/classifier_image.png and b/_img/3-neural_network/convolutiona_neural_network/classifier_image.png differ
diff --git a/_img/3-neural_network/convolutiona_neural_network/convlayer.png b/_img/3-neural_network/convolutiona_neural_network/convlayer.png
index d72eb10..dcf3e5a 100644
Binary files a/_img/3-neural_network/convolutiona_neural_network/convlayer.png and b/_img/3-neural_network/convolutiona_neural_network/convlayer.png differ
diff --git a/_img/3-neural_network/convolutiona_neural_network/graph.png b/_img/3-neural_network/convolutiona_neural_network/graph.png
index 0a77c73..85986b9 100644
Binary files a/_img/3-neural_network/convolutiona_neural_network/graph.png and b/_img/3-neural_network/convolutiona_neural_network/graph.png differ
diff --git a/_img/3-neural_network/convolutiona_neural_network/histogram_fc4_train.png b/_img/3-neural_network/convolutiona_neural_network/histogram_fc4_train.png
index cd27e44..cb04e6b 100644
Binary files a/_img/3-neural_network/convolutiona_neural_network/histogram_fc4_train.png and b/_img/3-neural_network/convolutiona_neural_network/histogram_fc4_train.png differ
diff --git a/_img/3-neural_network/convolutiona_neural_network/loss_accuracy_train.png b/_img/3-neural_network/convolutiona_neural_network/loss_accuracy_train.png
index 1818f3c..267c20b 100644
Binary files a/_img/3-neural_network/convolutiona_neural_network/loss_accuracy_train.png and b/_img/3-neural_network/convolutiona_neural_network/loss_accuracy_train.png differ
diff --git a/_img/3-neural_network/convolutiona_neural_network/loss_train.png b/_img/3-neural_network/convolutiona_neural_network/loss_train.png
index 4568169..8c8ce2a 100644
Binary files a/_img/3-neural_network/convolutiona_neural_network/loss_train.png and b/_img/3-neural_network/convolutiona_neural_network/loss_train.png differ
diff --git a/_img/3-neural_network/convolutiona_neural_network/terminal_training.png b/_img/3-neural_network/convolutiona_neural_network/terminal_training.png
index d9c3dbf..8f1f0cf 100644
Binary files a/_img/3-neural_network/convolutiona_neural_network/terminal_training.png and b/_img/3-neural_network/convolutiona_neural_network/terminal_training.png differ
diff --git a/_img/3-neural_network/convolutiona_neural_network/test_accuracy.png b/_img/3-neural_network/convolutiona_neural_network/test_accuracy.png
index 2988e88..a716e86 100644
Binary files a/_img/3-neural_network/convolutiona_neural_network/test_accuracy.png and b/_img/3-neural_network/convolutiona_neural_network/test_accuracy.png differ
diff --git a/_img/3-neural_network/multi-layer-perceptron/neural-network.png b/_img/3-neural_network/multi-layer-perceptron/neural-network.png
index e226ed5..5443a61 100644
Binary files a/_img/3-neural_network/multi-layer-perceptron/neural-network.png and b/_img/3-neural_network/multi-layer-perceptron/neural-network.png differ
diff --git a/_img/mainpage/CNNs.png b/_img/mainpage/CNNs.png
index 2d5c5ec..dd88b96 100644
Binary files a/_img/mainpage/CNNs.png and b/_img/mainpage/CNNs.png differ
diff --git a/_img/mainpage/TensorFlow_World.gif b/_img/mainpage/TensorFlow_World.gif
index 711fecb..02ca8a2 100644
Binary files a/_img/mainpage/TensorFlow_World.gif and b/_img/mainpage/TensorFlow_World.gif differ
diff --git a/_img/mainpage/Tensor_GIF.gif b/_img/mainpage/Tensor_GIF.gif
index 7fe540a..7964d37 100644
Binary files a/_img/mainpage/Tensor_GIF.gif and b/_img/mainpage/Tensor_GIF.gif differ
diff --git a/_img/mainpage/Tensor_GIF_ff.gif b/_img/mainpage/Tensor_GIF_ff.gif
index b94fb34..984b2cf 100644
Binary files a/_img/mainpage/Tensor_GIF_ff.gif and b/_img/mainpage/Tensor_GIF_ff.gif differ
diff --git a/_img/mainpage/basicmodels.png b/_img/mainpage/basicmodels.png
index 69efc32..659e046 100644
Binary files a/_img/mainpage/basicmodels.png and b/_img/mainpage/basicmodels.png differ
diff --git a/_img/mainpage/basics-old.png b/_img/mainpage/basics-old.png
index 5b77ce0..dac1414 100644
Binary files a/_img/mainpage/basics-old.png and b/_img/mainpage/basics-old.png differ
diff --git a/_img/mainpage/basics.gif b/_img/mainpage/basics.gif
index b26d131..3d99b1e 100644
Binary files a/_img/mainpage/basics.gif and b/_img/mainpage/basics.gif differ
diff --git a/_img/mainpage/installation-logo.gif b/_img/mainpage/installation-logo.gif
index fec9eec..8e43edc 100644
Binary files a/_img/mainpage/installation-logo.gif and b/_img/mainpage/installation-logo.gif differ
diff --git a/_img/mainpage/installation.gif b/_img/mainpage/installation.gif
index cdff0be..d7dc57c 100644
Binary files a/_img/mainpage/installation.gif and b/_img/mainpage/installation.gif differ
diff --git a/_img/mainpage/welcome.gif b/_img/mainpage/welcome.gif
index 376fbdb..a52fe6f 100644
Binary files a/_img/mainpage/welcome.gif and b/_img/mainpage/welcome.gif differ
diff --git a/codes/2-basics_in_machine_learning/linear_regression/updating_model.gif b/codes/2-basics_in_machine_learning/linear_regression/updating_model.gif
index a6eeb72..84305b1 100644
Binary files a/codes/2-basics_in_machine_learning/linear_regression/updating_model.gif and b/codes/2-basics_in_machine_learning/linear_regression/updating_model.gif differ
diff --git a/docs/_img/0-welcome/graph-run.png b/docs/_img/0-welcome/graph-run.png
index 1fe4e2b..1ad4072 100644
Binary files a/docs/_img/0-welcome/graph-run.png and b/docs/_img/0-welcome/graph-run.png differ
diff --git a/docs/_img/1-basics/basic_math_operations/graph-run.png b/docs/_img/1-basics/basic_math_operations/graph-run.png
index 1fe4e2b..2cc0e99 100644
Binary files a/docs/_img/1-basics/basic_math_operations/graph-run.png and b/docs/_img/1-basics/basic_math_operations/graph-run.png differ
diff --git a/docs/_img/2-basics_in_machine_learning/linear_regression/updating_model.gif b/docs/_img/2-basics_in_machine_learning/linear_regression/updating_model.gif
index a6eeb72..84305b1 100644
Binary files a/docs/_img/2-basics_in_machine_learning/linear_regression/updating_model.gif and b/docs/_img/2-basics_in_machine_learning/linear_regression/updating_model.gif differ
diff --git a/docs/_img/3-neural_network/autoencoder/ae.png b/docs/_img/3-neural_network/autoencoder/ae.png
index 488e2af..3ba525f 100644
Binary files a/docs/_img/3-neural_network/autoencoder/ae.png and b/docs/_img/3-neural_network/autoencoder/ae.png differ
diff --git a/docs/_img/3-neural_network/convolutiona_neural_network/accuracy_train.png b/docs/_img/3-neural_network/convolutiona_neural_network/accuracy_train.png
index df7b74f..91b2007 100644
Binary files a/docs/_img/3-neural_network/convolutiona_neural_network/accuracy_train.png and b/docs/_img/3-neural_network/convolutiona_neural_network/accuracy_train.png differ
diff --git a/docs/_img/3-neural_network/convolutiona_neural_network/activation_fc4_train.png b/docs/_img/3-neural_network/convolutiona_neural_network/activation_fc4_train.png
index 4d82e20..d4917e2 100644
Binary files a/docs/_img/3-neural_network/convolutiona_neural_network/activation_fc4_train.png and b/docs/_img/3-neural_network/convolutiona_neural_network/activation_fc4_train.png differ
diff --git a/docs/_img/3-neural_network/convolutiona_neural_network/architecture.png b/docs/_img/3-neural_network/convolutiona_neural_network/architecture.png
index 990ffc7..87a9772 100644
Binary files a/docs/_img/3-neural_network/convolutiona_neural_network/architecture.png and b/docs/_img/3-neural_network/convolutiona_neural_network/architecture.png differ
diff --git a/docs/_img/3-neural_network/convolutiona_neural_network/classifier_image.png b/docs/_img/3-neural_network/convolutiona_neural_network/classifier_image.png
index c5f00e3..1e060d5 100644
Binary files a/docs/_img/3-neural_network/convolutiona_neural_network/classifier_image.png and b/docs/_img/3-neural_network/convolutiona_neural_network/classifier_image.png differ
diff --git a/docs/_img/3-neural_network/convolutiona_neural_network/convlayer.png b/docs/_img/3-neural_network/convolutiona_neural_network/convlayer.png
index d72eb10..dcf3e5a 100644
Binary files a/docs/_img/3-neural_network/convolutiona_neural_network/convlayer.png and b/docs/_img/3-neural_network/convolutiona_neural_network/convlayer.png differ
diff --git a/docs/_img/3-neural_network/convolutiona_neural_network/graph.png b/docs/_img/3-neural_network/convolutiona_neural_network/graph.png
index 0a77c73..85986b9 100644
Binary files a/docs/_img/3-neural_network/convolutiona_neural_network/graph.png and b/docs/_img/3-neural_network/convolutiona_neural_network/graph.png differ
diff --git a/docs/_img/3-neural_network/convolutiona_neural_network/histogram_fc4_train.png b/docs/_img/3-neural_network/convolutiona_neural_network/histogram_fc4_train.png
index cd27e44..cb04e6b 100644
Binary files a/docs/_img/3-neural_network/convolutiona_neural_network/histogram_fc4_train.png and b/docs/_img/3-neural_network/convolutiona_neural_network/histogram_fc4_train.png differ
diff --git a/docs/_img/3-neural_network/convolutiona_neural_network/loss_accuracy_train.png b/docs/_img/3-neural_network/convolutiona_neural_network/loss_accuracy_train.png
index 1818f3c..267c20b 100644
Binary files a/docs/_img/3-neural_network/convolutiona_neural_network/loss_accuracy_train.png and b/docs/_img/3-neural_network/convolutiona_neural_network/loss_accuracy_train.png differ
diff --git a/docs/_img/3-neural_network/convolutiona_neural_network/loss_train.png b/docs/_img/3-neural_network/convolutiona_neural_network/loss_train.png
index 4568169..8c8ce2a 100644
Binary files a/docs/_img/3-neural_network/convolutiona_neural_network/loss_train.png and b/docs/_img/3-neural_network/convolutiona_neural_network/loss_train.png differ
diff --git a/docs/_img/3-neural_network/convolutiona_neural_network/terminal_training.png b/docs/_img/3-neural_network/convolutiona_neural_network/terminal_training.png
index d9c3dbf..8f1f0cf 100644
Binary files a/docs/_img/3-neural_network/convolutiona_neural_network/terminal_training.png and b/docs/_img/3-neural_network/convolutiona_neural_network/terminal_training.png differ
diff --git a/docs/_img/3-neural_network/convolutiona_neural_network/test_accuracy.png b/docs/_img/3-neural_network/convolutiona_neural_network/test_accuracy.png
index 2988e88..a716e86 100644
Binary files a/docs/_img/3-neural_network/convolutiona_neural_network/test_accuracy.png and b/docs/_img/3-neural_network/convolutiona_neural_network/test_accuracy.png differ
diff --git a/docs/_img/3-neural_network/multi-layer-perceptron/neural-network.png b/docs/_img/3-neural_network/multi-layer-perceptron/neural-network.png
index e226ed5..5443a61 100644
Binary files a/docs/_img/3-neural_network/multi-layer-perceptron/neural-network.png and b/docs/_img/3-neural_network/multi-layer-perceptron/neural-network.png differ
diff --git a/docs/_img/mainpage/TensorFlow_World.gif b/docs/_img/mainpage/TensorFlow_World.gif
index 711fecb..02ca8a2 100644
Binary files a/docs/_img/mainpage/TensorFlow_World.gif and b/docs/_img/mainpage/TensorFlow_World.gif differ
diff --git a/docs/_img/mainpage/Tensor_GIF.gif b/docs/_img/mainpage/Tensor_GIF.gif
index 7fe540a..7964d37 100644
Binary files a/docs/_img/mainpage/Tensor_GIF.gif and b/docs/_img/mainpage/Tensor_GIF.gif differ
diff --git a/docs/_img/mainpage/Tensor_GIF_ff.gif b/docs/_img/mainpage/Tensor_GIF_ff.gif
index b94fb34..984b2cf 100644
Binary files a/docs/_img/mainpage/Tensor_GIF_ff.gif and b/docs/_img/mainpage/Tensor_GIF_ff.gif differ
diff --git a/docs/_img/mainpage/installation.gif b/docs/_img/mainpage/installation.gif
index cdff0be..d7dc57c 100644
Binary files a/docs/_img/mainpage/installation.gif and b/docs/_img/mainpage/installation.gif differ