Branches v2.0

placeTorches = true
twoWide = true

function checkinv()
  if turtle.getItemCount(14) > 0 then
    turtle.select(1)
    turtle.turnRight()
    turtle.turnRight()
    turtle.place()
    for i = 2, 14 do
      turtle.select(i)
      while not turtle.drop() do
        os.sleep(1)
      end
    end
    turtle.select(1)
    turtle.dig()
    turtle.turnRight()
    turtle.turnRight()
    turtle.select(16)
  end
end

function forward(aantal, digDown, digUp)
  for i = 1, aantal do
    turtle.dig()
    while not turtle.forward() do
      os.sleep(1)
      turtle.dig()
    end
    if digDown then
      turtle.digDown()
    end
    if digUp then
      turtle.digUp()
    end
  end
  if digDown then
    checkinv()
  end
end

function back(aantal)
  for i = 1, aantal do
    while not turtle.back() do
      os.sleep(1)
    end
  end
end

function branch()
  turtle.select(16)
  for i = 1, 10 do
    forward(4,true,false)
    if i%2 == 0 and placeTorches then
      turtle.placeDown()
    end
    turtle.turnRight()
    forward(5,true,false)
    back(5)
    turtle.turnLeft()
  end

  turtle.turnLeft()
  if twoWide then
    forward(1,true,false)
  end
  forward(5,true,false)
  back(5)
  turtle.turnLeft()

  for i = 1, 19 do
    if twoWide then
      forward(4,true,false)
    else
      forward(4,false,false)
    end
    if i%2 == 0 and placeTorches then
      turtle.placeDown()
    end
    turtle.turnRight()
    forward(5,true,false)
    back(5)
    turtle.turnLeft()
  end
  forward(4,true,false)
end

args = {...}
dir = "not"

if (args[1] == "left") then
  dir = "left"
elseif (args[1] == "right") then
  dir = "right"
end
if (dir ~= "not") and ( 0 < tonumber(args[2]) and tonumber(args[2]) < 4 ) then
  while turtle.getFuelLevel() < (700*(tonumber(args[2]))) do
    term.clear()
    term.setCursorPos(1,1)
    print("You need to refuel, put coal in slot 2")
    io.read()
    turtle.select(2)
    turtle.refuel()
  end
  if placeTorches then
    while turtle.getItemCount(16) < (20*(tonumber(args[2]))) do
      term.clear()
      term.setCursorPos(1,1)
      print("You need to put "..(20*(tonumber(args[2]))).." torches in slot 16")
      io.read()
    end
  end
  while turtle.getItemCount(1) < 1 do
    term.clear()
    term.setCursorPos(1,1)
    print("You need to put 1 enderchest in slot 1")
    io.read()
  end

  for i = 1 , tonumber(args[2]) do
    branch()
    turtle.digUp()
    if ( dir == "left") then
      turtle.turnRight()
    else
      turtle.turnLeft()
    end
    if twoWide then
      forward(14,true,true)
    elseif dir == "left" then
      forward(13,true,true)
    else
      forward(15,true,true)
    end
    if ( dir == "left") then
      turtle.turnRight()
    else
      turtle.turnLeft()
    end
  end
end