Lesson 3, semi-compressed

local function PDF1()
  turtle.placeDown()
  turtle.forward()
end
local function PDF2()
  turtle.placeDown()
  turtle.forward()
  turtle.forward()
end
local function forteenahead()
  for num=1, 14 do
    turtle.forward()
  end
end
local function tenahead()
  for num=1, 10 do
    turtle.forward()
  end
end
local function doleft()
    turtle.turnLeft()
    turtle.forward()
    turtle.turnLeft()
    turtle.forward()
end
local function doright()
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
    turtle.forward()
end


turtle.turnRight()
turtle.forward()
PDF1()
PDF1()
forteenahead()
PDF1()
PDF1()
doleft()
turtle.forward()
turtle.forward()
PDF1()
PDF1()
tenahead()
PDF1()
PDF1()
turtle.forward()
turtle.forward()
doright()
PDF2()
PDF2()
PDF2()
for num=1,7 do
    turtle.forward()
end
PDF2()
PDF2()
PDF1()
doleft()
PDF1()

for num=1,4 do
    turtle.forward()
end
PDF1()
for num=1,6 do
    turtle.forward()
end
PDF1()
for num=1,4 do
    turtle.forward()
end
PDF1()
doright()
turtle.forward()
PDF1()
for num=1,4 do
    turtle.forward()
end
turtle.forward()
PDF1()
turtle.forward()
turtle.forward()
PDF2()
for num=1,4 do
    turtle.forward()
end
PDF1()
turtle.forward()
doleft()
for num=1,18 do
    turtle.forward()
end
doright()
turtle.forward()
PDF1()

forteenahead()
PDF2()
doleft()
turtle.forward()
PDF1()
forteenahead()

PDF2()
doright()
turtle.forward()
PDF1()
forteenahead()
PDF2()
doleft()
turtle.forward()

for num=1, 3 do
    PDF1()
end
turtle.forward()
for num=1, 8 do
    PDF1()
end
turtle.forward()
for num=1, 3 do
    PDF1()
end
turtle.forward()


turtle.turnRight()
for num=1,9 do
    turtle.back()
end