Curve
Deltoid
3-cusp hypocycloid
Astroid
4-cusp hypocycloid
Pentacycloid
5-cusp hypocycloid
Spirograph A
k = ²/₅ · inner loops
Spirograph B
k = ³/₇ · 7-fold
Loopy astroid
d > r · inner loops
Star rose
k = ³/₈ · 8-fold
Spiral rose
k = ²/₇ · 7-fold
Inner teeth p
2
Outer teeth q
5
Arm d/R
0.50
Color
★ Glow
🌈 Rainbow
↺ Cycling
⊙ Mechanism
▶▶ Normal
▶▶▶ Fast
k =
²/₅
n =
³/₂
period =
4π
θ =
0.000
d/r =
1.25
Presets
— pick a shape
p / q
— gear ratio k = p/q
Arm
— pen distance d/R