diff --git a/Design-Doc%3A-%60level%60-tool.md b/Design-Doc%3A-%60level%60-tool.md
index 14ee2f6..96ed9ae 100644
--- a/Design-Doc%3A-%60level%60-tool.md
+++ b/Design-Doc%3A-%60level%60-tool.md
@@ -77,6 +77,8 @@ For (Number of Sprites):
    2 bytes: Tile index location (in tiles.bin)
    1 byte: Sprite Width (tiles)
    1 byte: Sprite Height (tiles)
+   2 byte: Number of animation frames
+   2 byte: Animation speed (in 1/60 of a second)
 ```
 
 ### .ecs Format (Entity-Component System)