Science
Explore fractals, pendulums, spirographs, flow fields, and optical illusions — free in your browser.
Explore the wonderful world of Fractals. Fractals are complex, detailed geometric patterns found throughout the natural world.
Draw hypotrochoids and epitrochoids in your browser. Tune R, r, and pen offset, animate the curve, randomize styles, and save a PNG.
Paint damped Lissajous curves in your browser—the classic Blackburn painting pendulum. Tune frequency ratios, phases, and damping, animate the trail, and save a PNG.
Simulate a classical double pendulum in your browser. Paint chaotic tip trails, long-exposure paths, or distort a soft field—then save a PNG.
Interactive Lorenz attractor: tune a, b, f, rotate in 3D, try neon/ink/smoke looks, and save a PNG.
Simulate the Malkus/Lorenz chaotic waterwheel in your browser. Tune flow, leak, and friction, watch reversals, or switch to Lorenz ODEs—then save a PNG.
Steer thousands of particles with curl noise, wind, gravity, and clickable attractors, repellers, and vortices. Animate and save a PNG.
Grow trees, ferns, coral, and ice crystals from L-system DNA. Pause, randomize, and save a PNG in your browser.
Create recursive infinite-zoom feedback loops from any photo in your browser. Tune zoom, rotate, mirror, blend, blur, and hue, animate the tunnel, and save a PNG.
Paint chemical seeds and watch Gray–Scott reaction–diffusion grow spots, stripes, mazes, and coral. Tune feed, kill, diffusion, and speed — then save a PNG.
Play with 13 classic optical illusions in your browser, most made from your own photo: colour from grey, an afterimage, a spinning spiral, a hidden picture, the café wall, the Fraser spiral, drifting wheels and more. Tick Reveal the trick to see how each one works.