diff --git a/Data/Picture/cg_lesson.jpg b/Data/Picture/cg_lesson.jpg
index 8d4e077..5bd4767 100644
Binary files a/Data/Picture/cg_lesson.jpg and b/Data/Picture/cg_lesson.jpg differ
diff --git a/Data/Picture/cg_sales.png b/Data/Picture/cg_sales.png
index 1bdca05..36e9299 100644
Binary files a/Data/Picture/cg_sales.png and b/Data/Picture/cg_sales.png differ
diff --git a/Data/Picture/cg_sleep.jpg b/Data/Picture/cg_sleep.jpg
index 695d376..dfc9cd3 100644
Binary files a/Data/Picture/cg_sleep.jpg and b/Data/Picture/cg_sleep.jpg differ
diff --git a/Data/SystemFile/is_prof.png b/Data/SystemFile/is_prof.png
index ee8d8bf..d3c69bd 100644
Binary files a/Data/SystemFile/is_prof.png and b/Data/SystemFile/is_prof.png differ