right click → inspect → page source
bezierCurveTo (Pierre Bézier)
RESTART
COLOR
Example 1
Example 2
Example 3
C L E A N
x1
y1
x2
y2
x3
y3
Y/N
M
→ initial values
B1
L1
B2
L2
B3
L3
B4
L4
OK
View Lines
View Tangents