turtleAPI

function forward()
  if turtle.getFuelLevel()==0 then
    refueled=false
    for i=1, 16,1 do
      turtle.select(i)
      refueled=turtle.refuel(1)
      if refueled then
        break
      end
    end
  end
  turtle.forward()
end

function forceForward()
  if turtle.getFuelLevel()==0 then
    refueled=false
    for i=1, 16,1 do
      turtle.select(i)
      refueled=turtle.refuel(1)
      if refueled then
        break
      end
    end
  end
  while turtle.detect() do
      turtle.dig()
  end
  forward()
  while turtle.detectUp() do
      turtle.digUp()
  end
end

function findItem(name)
  for i=1,16,1 do
    data=turtle.getItemDetail(i)
    if (data~=nil and data.name==name) then
      return i
    end
  end
  return 0
end

function placeTorch()
  loc=findItem("minecraft:torch")
  if loc==0 then
    return
  end
  turtle.select(loc)
  turtle.placeUp()
end

function channel(d)
  for i=0, d,1 do
    while turtle.detect() do
      turtle.dig()
    end
    forward()
    while turtle.detectUp() do
      turtle.digUp()
    end

  end
end

function goForwardAndTorch(d)
  local torchSpacing=5
  local sinceLastTorch=0
  for i=0, d,1 do
    forceForward()
    if i%torchSpacing==1 then
      placeTorch()
    end
  end
end

function goForward(d)
  for i=0,d,1 do
    forward()
  end
end