Platform maker 1.0

-- * ------------------------------* --
-- * Platform maker 1.0            * --
-- * Made by: Acuena               * --
-- * Usage: platform length width  * --
-- * ----------------------------- * --

-- Variables
curslot = 2
fuelused = 0
blocksplaced = -1
totalnrblocks = 0

-- Functions

function moveforward()
 while not turtle.forward() do
 checkfuel()
 end
end

function checkfuel()
 if turtle.getFuelLevel() < 1 then
   turtle.select(1)
   if not turtle.refuel(1) then
    print("No fuel in slot 1, awaiting fuel")
    while not turtle.refuel(1) do
    end
    print("Successfully refueld, continuing")
    end
    fuelused = fuelused + 1
  turtle.select(curslot)
 end
end

function turnright()
 turtle.turnRight()
 moveforward()
 turtle.turnRight()
end

function turnleft()
 turtle.turnLeft()
 moveforward()
 turtle.turnLeft()
end

function checkblockcount()
  if turtle.getItemCount(curslot) == 0 then
   selnextslot()
 end
end

function selnextslot()
 curslot = curslot + 1
 if curslot > 16 then
 print("Out of blocks, terminating")
 error()
 end
turtle.select(curslot)
end

function place()
checkblockcount()
turtle.placeDown()
blocksplaced = blocksplaced + 1
end

function countblocks()
for i = 2,16 do
  turtle.select(i)
  totalnrblocks = totalnrblocks + turtle.getItemCount(i)
end

 if not totalnrblocks == 0 then
  totalnrblocks = totalnrblocks + 1
 end
 turtle.select(curslot)
end


-- Code

    local args = {...}
    orient=false
if #args ~= 2 then -- Check so it has both arguments
    print("Usage: platform length width")
    return
end

length = tonumber(args[1])
width = tonumber(args[2])

countblocks()
need = length * width

if need > 960 then
print("Unable to carry more than 960 block's")
print("A platform with the size of:")
print(length.."x"..width.." will need "..need.." blocks")
print("Aborting run")
error()
end

if totalnrblocks < need then
 print("Not enughe blocks, aborting")
 print("Need: "..need)
 print("Have: "..totalnrblocks.." block's")
 error()
end

moveforward()
place()
for xx = 1,width do
    for x = 1, length-1 do
--  place()
 moveforward()
 place()
    end

    if orient == false then -- Should turn right
  turnright()
  place()
    else -- Should turn left
         turnleft()
   place()
    end
orient = not orient
end
turtle.digDown()

print("Platform done")
print("Block's placed: "..blocksplaced)
print("Fuel used: "..fuelused)