diff --git a/images/CREDITS.md b/images/CREDITS.md
new file mode 100644
index 0000000..416af39
--- /dev/null
+++ b/images/CREDITS.md
@@ -0,0 +1,2 @@
+- snow.png (Public domain): Gareth Patterson => https://www.flickr.com/photos/gareth_patterson/6858690131/
+- clouds.png (Public domain): Joe deSousa => https://www.flickr.com/photos/mustangjoe/14639363196/
diff --git a/images/clouds.jpg b/images/clouds.jpg
deleted file mode 100644
index 6bd6f57..0000000
Binary files a/images/clouds.jpg and /dev/null differ
diff --git a/images/clouds.png b/images/clouds.png
new file mode 100644
index 0000000..3f9f7d1
Binary files /dev/null and b/images/clouds.png differ
diff --git a/images/snow.png b/images/snow.png
new file mode 100644
index 0000000..c84313b
Binary files /dev/null and b/images/snow.png differ
diff --git a/images/sun_cloud.jpg b/images/sun_cloud.jpg
deleted file mode 100644
index e1add84..0000000
Binary files a/images/sun_cloud.jpg and /dev/null differ