diff --git a/images/Untitled.png b/images/Untitled.png
deleted file mode 100644
index 2e3e0cd..0000000
Binary files a/images/Untitled.png and /dev/null differ
diff --git a/images/usecase.png b/images/usecase.png
new file mode 100644
index 0000000..7746131
Binary files /dev/null and b/images/usecase.png differ