from math import *
from inspect import *
from string import Template

def g(text):
  "display gcode"

  s = Template(text)
  ss = s.safe_substitute(sys._getframe(1).f_locals)
  t = Template(ss)
  tt = t.safe_substitute(globals())

  print tt

def flowsnake( level, startX, startY, endX, endY ):

 if level == 0:
    g("g1 f10 x$endX y$endY ($Glevel)")

 else:
        p1X = ((startX * 2 + endX)/3)
        p1Y = ((startY * 2 + endY)/3)

        p2X = ((startX + endX)/2 + (endY - startY)/(sqrt(12.0)))
        p2Y = ((startY + endY)/2 - (endX - startX)/(sqrt(12.0)))

        p3X = ((startX + 2 * endX)/3)
        p3Y = ((startY + 2 * endY)/3)

        flowsnake ((level-1), startX, startY, p1X, p1Y)
        flowsnake ((level-1), p1X, p1Y, p2X, p2Y,)
        flowsnake ((level-1), p2X, p2Y, p3X, p3Y,)
        flowsnake ((level-1), p3X, p3Y, endX, endY,)

print "S1M3"
print "g0 z1"
print "g0 x.25 y1.0"
print "g1 f10 z0"
Glevel = 2
flowsnake (Glevel, .25, 1.0, 3.75, 1.0)
flowsnake (Glevel, 3.75, 1.0, 2.0, 3.95)
flowsnake (Glevel, 2.0, 3.95, .25, 1.0)
print "g0 z1"
print "M5"