DvD bounce animation with Turtlesim node

edit

I’ve been trying to make a DVD bouncing animation with Turtlesim node just to practice. I’m pretty beginner and have been using Rclpy library and it’s spin function to run code.

Right now I’m trying to make it bounce around screen like a DVD player animation, but i can’t seem to store the initial Theta from when the turtle hits the wall to calculate the exit theta. I’m also having trouble giving conditions to my turtle inorder to stop it from rotating after reaching said new exit theta.

Really hope someone can help me as i’m still new to ROS