GauFloor v0.1

local selection = 1
turtle.select(selection)


function tryForward()
  if ( turtle.forward() == false ) then
    print("Get out of my way!!")
    while ( turtle.forward() == false ) do
      os.sleep(2)
    end
  end
end


function selectBlock()
  if ( selection == 16 ) then return end

  while ( turtle.getItemCount(selection) <= 0 ) do
    if ( selection == 16 ) then return end
    selection = selection + 1
    turtle.select(selection)
  end
end


function DropBlock()
  selectBlock()
  turtle.placeDown()
end

local left,right = 1,2

local turn = left


function doTurn()
  if ( turn == left ) then
    turtle.turnLeft()
  else
    turtle.turnRight()
  end
end

function switchTurn()
  if ( turn == left ) then
    turn = right
  else
    turn = left
  end
end

if ( turtle.detectDown() ) then turtle.forward() end


while ( turtle.detectDown() == false ) do
  -- do a row
  while ( turtle.detectDown() == false ) do
    DropBlock()
    tryForward()
  end
  doTurn()
  turtle.forward()
  doTurn()
  turtle.forward()
  switchTurn()
end