diff --git a/doc/imgs/1.jpg b/doc/imgs/1.jpg
new file mode 100644
index 0000000000..08010177fe
Binary files /dev/null and b/doc/imgs/1.jpg differ
diff --git a/doc/imgs/11.jpg b/doc/imgs/11.jpg
new file mode 100755
index 0000000000..ed91b8c5ca
Binary files /dev/null and b/doc/imgs/11.jpg differ
diff --git a/doc/imgs/12.jpg b/doc/imgs/12.jpg
new file mode 100644
index 0000000000..3cd2e79182
Binary files /dev/null and b/doc/imgs/12.jpg differ