These are my experiments with the Sketch library for Common Lisp, which provides a Processing-like interface for creative programming.

• Add a soft link to this directory to quicklisp's local-projects folder (ln -s /path/to/sketches/ /quicklisp/local-projects/).
• Clone my fork of Sketch into your local-projects folder, from here.
• Follow the normal installation instructions for Sketch (includes an SDL2-specific step).
• From the REPL, load the system: (ql:quickload 'sketches).
• Switch to the sketches package: (in-package sketches).
• To run a particular sketch from the list below, like stars: (start-sketch 'stars).

In case this list is incomplete, you can run (print-all-sketches) to show all the available sketches.

• stars: a star field based on The Coding Train's first coding challenge.
• heightmap: testing out my implementation of correlated noise.
• rain: rain, wind and fog.
• unknown: recreation of the Unknown Pleasures album cover, uses noise to make the lines wobble over time.
• flowfield: flow field sketch based on The Coding Train's video.
• dots: particles move around a flow field and displace dots.
• snow: mountains and snow.
• growth: colourful blobs growing randomly.
• groove2: recreation of a piece I saw at the Institute of Contemporary Art in Boston.
• mandelbrot: the Mandelbrot set.
• squarez: a grid of white quadrilaterals on a black background, inspired by a t-shirt I saw.
• xmas: recursive Christmas trees, in the colours of Palestine.
• invaders: a skeleton implementation of Space Invaders that I did for my Recurse Center application.
• toast: a piece of toast that bounces and always lands on the wrong side, contains a crappy/non-general implementation of Verlet physics.
• reaction-diffusion: visualisation of the reaction diffusion model, based on a Coding Train video.
• palette: for testing out colour palettes.
• trees.recursive: random trees drawn using recursion.
• trees.oo: random trees drawn using object-oriented modelling (with leaves!).
• trees.lsystem: random trees drawn using an L-system.
• swirl: particles spiraling towards the center of the canvas and leaving a trail in their wake.
• reuleaux: reuleaux triangle rotating in a square.
• lsystems.koch: a variant of the Koch curve.
• lsystems.sierspinski: the Sierspinski triangle.
• terrain: using noise to generate islands and mountains.
• nested-squares: squares inside squares.
• dandy: a medusa-like flower thing.
• boids: an implementation of the boids algorithm for simulating flocking behaviour.
• nadasurf: an animated version of the album cover from Nada Surf's Let Go.
• barricelli: a simple version of Barricelli's cellular automata, as described in this blog post.