--[[
  terraform flattens land
]]--

X_SIZE = 3
Z_SIZE = 3

FUEL_SLOT = 1

function checkFuel()
  if turtle.getFuelLevel() < 80 then
    print("Refueling...")
    turtle.select(FUEL_SLOT)
    turtle.refuel(1)
  end
end

function dig()
  checkFuel()

  while turtle.detect() do
    print("Digging")
    turtle.dig()
  end
end

function clearBlock()
  y = 0
  dig()
  turtle.forward()
  while turtle.detectUp() do
    print("Found block above, going up")
    y = y + 1
    turtle.digUp()
    turtle.up()
  end

  print("Coming back down")
  for i = 0, y do
    turtle.down()
  end
end

function clearRow()
  for z = 1, Z_SIZE do
    print("Clear row", z)
    clearBlock()
  end
end

x = 1
repeat
  clearRow()
  turtle.turnRight()
  clearBlock()
  turtle.turnRight()
  clearRow()
  turtle.turnLeft()
  clearBlock()
  turtle.turnLeft()
until x >= X_SIZE