diff --git a/docs/images/markers_1.JPG b/docs/images/markers_1.JPG
new file mode 100644
index 0000000..4ae5008
Binary files /dev/null and b/docs/images/markers_1.JPG differ
diff --git a/docs/images/markers_2.JPG b/docs/images/markers_2.JPG
new file mode 100644
index 0000000..44136c2
Binary files /dev/null and b/docs/images/markers_2.JPG differ
diff --git a/docs/images/markers_3.JPG b/docs/images/markers_3.JPG
new file mode 100644
index 0000000..6de976e
Binary files /dev/null and b/docs/images/markers_3.JPG differ
diff --git a/docs/images/markers_4.JPG b/docs/images/markers_4.JPG
new file mode 100644
index 0000000..ff6dba5
Binary files /dev/null and b/docs/images/markers_4.JPG differ