diff --git a/doc/imgs/hi_1.jpg b/doc/imgs/hi_1.jpg
new file mode 100644
index 0000000..be4b609
Binary files /dev/null and b/doc/imgs/hi_1.jpg differ
diff --git a/doc/imgs/hi_2.jpg b/doc/imgs/hi_2.jpg
new file mode 100644
index 0000000..bd77579
Binary files /dev/null and b/doc/imgs/hi_2.jpg differ
diff --git a/doc/imgs/mr_1.jpg b/doc/imgs/mr_1.jpg
new file mode 100644
index 0000000..a518e03
Binary files /dev/null and b/doc/imgs/mr_1.jpg differ
diff --git a/doc/imgs/mr_2.jpg b/doc/imgs/mr_2.jpg
new file mode 100644
index 0000000..0fe8557
Binary files /dev/null and b/doc/imgs/mr_2.jpg differ
diff --git a/doc/imgs/ne_1.jpg b/doc/imgs/ne_1.jpg
new file mode 100644
index 0000000..95b117f
Binary files /dev/null and b/doc/imgs/ne_1.jpg differ
diff --git a/doc/imgs/ne_2.jpg b/doc/imgs/ne_2.jpg
new file mode 100644
index 0000000..cc6e45b
Binary files /dev/null and b/doc/imgs/ne_2.jpg differ