-- Platform script, written by iPeer

local args = { ... }
local len = tonumber(args[1]) or 9999
local width = tonumber(args[2]) or 9999
local curwidth = width
local dir = tonumber(args[3]) or 0
local curlen = 0

print("Creating a "..len.."x"..width.." platform")

function hasBlocks()
  for s = 1, 16 do
    if turtle.getItemCount(s) > 0 then
      turtle.select(s)
      return true
    end
  end
  return false
end

for z = width-1, 0, -1 do
  for x = 0, len-1 do
    if not hasBlocks() then
      print("Out of blocks.")
            return
    end
    if not turtle.detectDown() then
      turtle.placeDown()
    end
    if (x < len-1) then
      if not turtle.forward() then
        break
      end
    end
  end
  if z > 0 then
    if dir == 1 then
      dir = 0
      turtle.turnRight()
      if not turtle.forward() then
        print("There\'s an obstruction.")
        break
      end
      turtle.turnRight()
    else
      dir = 1
      turtle.turnLeft()
      if not turtle.forward() then
        print("There\'s an obstruction.")
        break
      end
      turtle.turnLeft()
    end
  end
end