Enter values then press "Draw." It may take a few seconds to draw. For an explanation of the fields, see about Math for Tanabata. Here are some sample images.
Input target point: x y
Color A
Color B
Gradient none
mods for the gradient R none 2 3 5 G none 2 3 5 B none 2 3 5
N
ε 0 ≤ ε < 1
width
Note: This program will run in current versions of Chrome, Safari, Firefox, and IE9 (except for 'save drawing').