Spirograph

Track Ring · 105T

Wheel Round · 48T

Every wheel fits the round Ring.

Pen Hole 17 of 27 · 0.61

Pen hole

Hole 17 of 27 · pen at 0.61

Step with − + under the wheel, or [ and ]

Ring & ratios 105T · 48T · 16 laps

The Track sets the outer tooth count and the Wheel the inner one. A pattern closes after lcm(track, wheel) ÷ track laps.

Track 105T Wheel 48T Zoom 1× Pen hole 30

Sound Soft tick

Sound Intensity 40

Low is soft and muted. High is louder and crisper.

Hold and rotate the wheel — the pen follows.