flatten

local function printheader()
term.clear()
term.setCursorPos(1,1)
print("-----------------------------------")
print("FlatIt             | RXDV Laboratories")
print("-----------------------------------")
end
local function invcheck()
while true do
for n=1,9 do
  if turtle.getItemCount(n) > 0 then
   return n
  end
end
printheader()
print("")
print("")
print("ERROR: No Blocks in Inventory. ")
print("    Please load any block into ")
print("    inventory.")
sleep(1)
end
end
local function eatforward()
-- x,y,z = gps.locate( 2, true )
while not turtle.detectDown() do
  turtle.down()
  dy = dy - 1
end
while dy < 0 do
  turtle.up()
  dy = dy + 1
  turtle.select(invcheck())
  turtle.placeDown()
end
while turtle.detect() do
  turtle.dig()
  turtle.up()
  dy = dy + 1
end
while dy > 0 do
  turtle.down()
  dy = dy - 1
end
turtle.forward()
print("nom")
end
local function checkturn()
if curdir == 0 then
if dir == "left" then
  curdir = 1
  turtle.turnLeft()
  eatforward()
  turtle.turnLeft()
  print("1")
  return true
end
if dir == "right" then
  curdir = 1
  turtle.turnRight()
  eatforward()
  turtle.turnRight()
  print("2")
  return true
end
end
if curdir == 1 then
if dir == "right" then
  curdir = 0
  turtle.turnLeft()
  eatforward()
  turtle.turnLeft()
  print("3")
  return true
end
if dir == "left" then
  curdir = 0
  turtle.turnRight()
  eatforward()
  turtle.turnRight()
  print("4")
  return true
end
end
end
local function eatfar()
while ddist < dist do
  ddist = ddist + 1
--  eaten = eaten + 1
  eatforward()
end
end
local function eatall()
while dside < side do
  eatfar()
  ddist = 0
  checkturn()
  dside = dside + 1
end
eatfar()
end
local tArgs = { ... }
if #tArgs < 3  then
printheader()
print("Land Flatter for Turtles.  by Dalva")
print("")
print("")
print("USAGE : flatit <left/right>  ")
print("         <length> <width>")
print("EX       : flatit 10 right 5")
print("NOTE  : Do not use in areas where ")
print("         trees are present.")
return false
end
if not tArgs[1] == left and tArgs[1] == right then
printheader()
print("")
print("")
print("ERROR: Unknown Direction: " ..tArgs[1])
print("Please input either left/right")
print("")
return false
end
dy = 0
ddist = 0
dside = 0
curdir = 0
dist = tonumber(tArgs[2])
side = tonumber(tArgs[3])
dir = (tArgs[1])
printheader()
print("")
print("")
print("Beginning Flattening Operation...")
print("Length   : " ..dist)
print("Width     : " ..side)
print("Direction : " ..dir)
print("")
eatall()
printheader()
print("")
print("")
print("SUCCESS: Flattening Completed")