red_placer

turtle.select(1)
slot=1

while true do
  if turtle.getFuelLevel()<4 then
    turtle.select(16)
    turtle.refuel()
  elseif turtle.getItemCount()<2 then
    slot=slot+1
    turtle.select(slot)
  end
  for i=1,4 do
    turtle.forward()
    turtle.placeDown()
  end
  turtle.turnRight()
end