diff --git a/README.md b/README.md
index 4f4ea0d..6910b71 100644
--- a/README.md
+++ b/README.md
@@ -19,4 +19,9 @@ cargo run outfile
 ```
 
 * tested on jdk20/G1 collector
-* depends on tail command, so works best on linux/unix/macos
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+* depends on tail command, so works best on linux/unix/macos
+
+![how it looks](screencast.gif)
+
+[GREEN] heap size before garbage collection
+[RED] heapsize after garbage collection
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