from cs1graphics import *
paper = Canvas(300, 200, 'white')

w = 200.0
h = 30.0
numPickets = 20
woodColor = 'tan'
indivWidth = w / (2*numPickets -1 )
fence = Layer()

for centerH in [h/3, 2*h/3]:
  cross = Rectangle(w, indivWidth)
  cross.move(w/2, -centerH)
  cross.setFillColor(woodColor)
  cross.setDepth(51)
  fence.add(cross)

for p in range(numPickets):
  picket = Rectangle(indivWidth, h)
  picket.setFillColor(woodColor)
  picket.move(indivWidth/2 + 2*indivWidth*p, -h/2)
  fence.add(picket)

fence.setDepth(1)
fence.move(50,185)
paper.add(fence)