def triangles(side=100, step=20, n=10):
t = Turtle('triangles')
d = 300
for i in xrange(n):
side += (3*step)
t.polygon(3, side)
t.right(120)
t.pen_up()
t.forward(step)
t.left(120)
t.back(step)
t.pen_down()
t.save()
turtle = Turtle('pentagram_rel')
turtle.right(90 / 5)
for i in range(5):
turtle.right(360 / 5)
turtle.forward(dist)
turtle.right(90 + 90 / 5)
for i in range(5):
turtle.right((180 - (360 / 5)) / 3)
if i % 2 == 0:
turtle.forward(dist * golden_ratio)
else:
turtle.back(dist * golden_ratio)
turtle.save()
#################### pentagram absolute
import svgwrite
from math import sin, sqrt, tan, cos, pi
def render(lines):
dwg = svgwrite.Drawing('pentagram_abs.svg', profile='tiny')
stroke = svgwrite.rgb(10, 10, 16, '%')
for f, t in lines:
dwg.add(dwg.line(f, t, stroke=stroke))
