Make a mark. Let it go.

Move to awaken the dots. Press and draw to leave a colourful trail that gently disappears.

Hover to stir the field · Press and drag to scribble

Dot spacing

Reaction radius

Field growth

Trail fade

Experimental interaction study. The reactive dot field and dotted trail are independently rendered; the trail changes hue with drawing speed. All drawing stays in your browser—nothing is uploaded or saved.