This simple physics engine represents particles as spheres that are procedurally generated and imparted with a random size, position, color, and velocity.

More particles are created by interacting with the display and their physics are updated with each frame to show their motion, and collisions with the environment.

• The new position is calculated using the current velocity and Euler integration
• The velocity is updated using the acceleration and Euler integration, with drag
• The acceleration is updated using the force of gravity