BranchMine

term.clear()
term.setCursorPos(1,1)
term.write("Branch depth: ")
local length = io.read()
term.setCursorPos(1,2)
term.write("Number of branches: ")
local number = io.read()
term.clear()


function forward()
  term.clear()
  term.setCursorPos(1,1)
  print("Branch Mining...")

  if turtle.getItemCount(13) > 0 or turtle.getItemCount(14) > 0 then
    unload()
  end
  while not turtle.forward() do
    if not turtle.dig() then
      sleep(1)
    end
  end
end

function back()
  while not turtle.back() do
    sleep(1)
  end
end

function left()
  turtle.turnLeft()
end

function right()
  turtle.turnRight()
end

function dig()
  turtle.digDown()
  while turtle.detectUp() do
    turtle.digUp()
    sleep(0.8)
  end
end

function placeTorch()
  for i=1,14 do
    turtle.select(i)
    if turtle.compareTo(15) then
      turtle.placeDown()
      return
    end
  end
end

function unload()
  turtle.select(16)
  turtle.digUp()
  turtle.placeUp()
  for i=1,14 do
    turtle.select(i)
    if not turtle.compareTo(15) then
      turtle.dropUp(turtle.getItemCount(i))
    end
  end
  turtle.select(1)
end

function digLine()
  for i=1,4 do
    forward()
    dig()
  end
  back()
  back()
  left()
  placeTorch()
  for i=1,length do
    if i % 5 == 0 then
      placeTorch()
    end
    forward()
    dig()
  end
  right()
  placeTorch()
  for i=1,3 do
    forward()
    dig()
  end
  right()
  placeTorch()
  for i=1,length*2 do
    if i % 5 == 0 then
      placeTorch()
    end
    forward()
    dig()
  end
  right()
  placeTorch()
  for i=1,3 do
    forward()
    dig()
  end
  right()
  placeTorch()
  for i=1,length do
    if i % 5 == 0 then
      placeTorch()
    end
    forward()
    dig()
  end
  right()
  for i=1,4 do
    if i==3 then
      placeTorch()
    end
    forward()
    dig()
  end
end

for i=1,number do
  digLine()
end