Update README.md

README.md

@@ -39,6 +39,7 @@ You can explore the following folders to access individual projects and code sam
 - [Day 27 : Animated Cute Lion](https://github.com/withaarzoo/100-Days-of-Code/tree/main/%5B%20Day%2027%20%5D%20-%20Animated%20Cute%20Lion) : Welcome to the Animated Cute Lion repository! This project showcases a delightful animated lion created using HTML and CSS animations. It's a fun and engaging way to learn about web animations while enjoying the cuteness of a lion.
 - [Day 28 : Animated Dog](https://github.com/withaarzoo/100-Days-of-Code/tree/main/%5B%20Day%2028%20%5D%20-%20Animated%20Dog) : The code provided creates an animated dog using CSS. The dog's various body parts, such as the head, ears, legs, and tail, are animated to create a lifelike movement. The animation is achieved through the use of CSS variables, keyframes, and various positioning and transformation techniques.
 - [Day 29 : Animated Doraemon](https://github.com/withaarzoo/100-Days-of-Code/tree/main/%5B%20Day%2029%20%5D%20-%20Animated%20Doraemon) : This is a simple HTML and CSS code snippet to create an animated representation of Doraemon, the famous cartoon character. The code utilizes basic HTML structure along with CSS styling to create the visual effect .
+- [Day 30 : 3D Rotate Tube](https://github.com/withaarzoo/100-Days-of-Code/tree/main/%5B%20Day%2030%20%5D%20-%203D%20Rotate%20Tube) : This is a simple HTML and CSS code snippet that creates a 3D rotating tube with animated text on its faces. The tube is displayed in a webpage and the text on each face of the tubr changes dynamically, creating a visually engaging effect.
 
 Feel free to dive into any folder to view the code and project details.