updated readme

Author: premaseem

README.md

@@ -4,10 +4,10 @@ Visitor design pattern uses a visitor class which changes the executing algorith
 ## Diagram
 ![Diagram](https://github.com/premaseem/DesignPatternsJava9/blob/visitor-pattern/diagrams/Visitor-Pattern-class-diagram%20.png "Diagram")
 
-![Diagram](https://github.com/premaseem/DesignPatternsJava9/blob/visitor-pattern/diagrams/VisitorSequenceDiagram.png "Diagram")
-
 ![Diagram](https://github.com/premaseem/DesignPatternsJava9/blob/visitor-pattern/diagrams/visitorPattern-generic.jpeg "Diagram")
 
+![Diagram](https://github.com/premaseem/DesignPatternsJava9/blob/visitor-pattern/diagrams/VisitorSequenceDiagram.png "Diagram")
+
 ### When to use Visitor  Design Pattern 
 Visitor pattern is used when we have to perform an operation on a group of similar kind of Objects. With the help of visitor pattern, we can move the operational logic from the objects(Elements) to another class (Visitor class).