turtle_platform1.12

left = true
slot = 1
width = 0
depth = 0
restart = "testPlatform" -- name of program for reseting




-- Checks for Empty slot and switches if empty

local function slotCheck()
  if turtle.getItemCount() == 0 then
    slot = slot + 1
  end
  turtle.select(slot)
end




-- checks for material and fuel

local function matCheck()

  material = 0

  for i = 1, 16 do
    turtle.select(i)
    material = material + turtle.getItemCount()
  end

  fuel = turtle.getFuelLevel()
  materialRequired = width * depth

  if materialRequired > material then
    print("Not enough material to complete task")
    shell.run(restart)
  elseif materialRequired > fuel then
    print("Not enough fuel to complete task")
    shell.run(restart)
  else
    print("Materials and fuel are sufficient, starting platform")
  end

end




-- Startup prompt

print("Platform dimensions, Width to the left and depth straight ahead.")
print("Enter a width")
width = read()
print("Enter a depth")
depth = read()
matCheck()

-- Start of turtle movement

turtle.select(1)
for i = 1, width do

    for j = 1, depth do
        slotCheck()
        turtle.placeDown()
        turtle.forward()
    end

    if left == true then
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
        turtle.forward()
        left = false
    else
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
        turtle.forward()
        left = true
    end

end