floor

for x=1,31,1 do
    if turtle.getItemCount(turtle.getSelectedSlot()) == 0 then
     turtle.select(turtle.getSelectedSlot()%16 +1)
    end
    turtle.placeDown()
    for y=1,39,1 do
        if turtle.getItemCount(turtle.getSelectedSlot()) == 0 then
         turtle.select(turtle.getSelectedSlot()%16 + 1)
        end
        turtle.forward()
        turtle.placeDown()
    end
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()

    if turtle.getItemCount(turtle.getSelectedSlot()) == 0 then
     turtle.select(turtle.getSelectedSlot()%16 +1)
    end
    turtle.placeDown()
    for y=1,39,1 do
        if turtle.getItemCount(turtle.getSelectedSlot()) == 0 then
         turtle.select(turtle.getSelectedSlot()%16 + 1)
        end
        turtle.forward()
        turtle.placeDown()
    end
    turtle.turnLeft()
    turtle.forward()
    turtle.turnLeft()
end