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+# Reaction Time Tester
+**Tier:** 1-Beginner
+
+The Reaction Time Tester measures how quickly a user can respond to visual stimuli. This project teaches you about timing functions, random intervals, and performance measurement in a fun, interactive way.
+
+## Constraints
+- You may not use the test if you click before the screen turns green (false start)
+- Maximum wait time should not exceed 5 seconds
+## User Stories
+- **User** can see a start screen with instructions
+- **User** can click a "Start Test" button to begin
+- **User** can see a waiting screen with a message "Wait for green..."
+- **User** can see the screen change color randomly after 1-5 seconds
+- **User** can click the screen as quickly as possible when it turns green
+- **User** can see their reaction time displayed in milliseconds
+- **User** can see a "Test Again" button to restart the test
+
+### Bonus Features
+- **User** can see their best (fastest) reaction time
+- User can test multiple times to get their avg score
+
+## Useful links and resources
+<a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/Date">MDN Docs</a>
+
+### Example project
+<a href="https://tinyurl.com/mr2vsmp5">Reaction Time Tester</a>
+
+