What it does
Draw with your finger or mouse. Lines glow and then fade, like phosphor traces on an old vector display. The screen never fully clears — ghosts of previous drawings linger at the threshold of visibility.
What it demonstrates
Phosphor persistence — the way old CRT displays didn’t switch pixels off instantly but let them decay. Vector displays like the Vectrex or early oscilloscope games drew bright lines that slowly dimmed into green or amber afterglow. This is that feeling, in a browser.
How to interact
- Draw: Click/touch and drag across the canvas
- Palette: Tap the color name to cycle between amber, green, and white
- Clear: Press the clear button — but notice the ghosts that remain