TreeTurtle

returning = false
space = 4
st = 60
warning = 20
limit = turtle.getFuelLimit()

function getFuelPercentage()
  level = turtle.getFuelLevel()
  percentage = (level/limit)*100
  print("fuel at: "..percentage.."%")
  return percentage
end

function chop()
  print("Chopping")
  turtle.select(1)
  --sleep(st)
  turtle.turnRight()
  local success, data = turtle.inspect()
  if (success and data.name == "minecraft:log") then
----chopping------
    turtle.dig()
    turtle.forward()
    repeat
      local success, data = turtle.inspectUp()
      turtle.digUp()
      turtle.suck()
      turtle.up()
    until data.name ~= "minecraft:log"
    while turtle.down() do
    end
    for i = 1,4 do
      turtle.suck()
      turtle.turnRight()
    end
    turtle.back()
  end
  turtle.place()
  turtle.turnLeft()
end

function move()
  --sleep(st)
  for i = 1,space do
    turtle.forward()
    turtle.suck()
  end
  local success, data = turtle.inspect()
  if success then
    print("i see a wall")
    print("Block name: ", data.name)
    rotate()
    return
  end
  print("moving")
end

function unload()
  print("Unloading")
  --sleep(st)
  turtle.turnLeft()
  for j = 1,4 do
    turtle.forward()
    for i=1,16 do
      turtle.select(i)
      turtle.dropDown()
    end
    if j == 4 and getFuelPercentage() < warning then
      print("fuel low")
      turtle.select(1)
      turtle.suckDown()
      turtle.refuel()
    end
  end
  for j = 1, 4 do
    turtle.back()
    if j == 1 then
      turtle.select(1)
      turtle.suckDown()
    end
  end
  turtle.turnRight()
  print("sleeping")
  sleep(st)
end

function rotate()
  print("Rotating")
  --sleep(st)
  turtle.turnRight()
  turtle.forward()
  turtle.forward()
  turtle.turnRight()
  if returning then
    unload()
    returning = false
    move()
  else
    returning = true
  end
end


----------Main----------


while true do
  move()
  if not returning then
    chop()
  end
  --print(returning)
end