local height = 20
local width = 6

function placeRing()
  turtle.up()
  local loops = width
  while loops > 0 do
    turtle.forward()
    turtle.placeDown()
    loops = loops - 1
  end
  turtle.forward()
  turtle.turnRight()
  local loops = width
  while loops > 0 do
    turtle.forward()
    turtle.placeDown()
    loops = loops - 1
  end
  turtle.forward()
  turtle.turnRight()
  local loops = width
  while loops > 0 do
    turtle.forward()
    turtle.placeDown()
    loops = loops - 1
  end
  turtle.forward()
  turtle.turnRight()
  local loops = width
  while loops > 0 do
    turtle.forward()
    turtle.placeDown()
    loops = loops - 1
  end
  turtle.forward()
  turtle.turnRight()
end

function buildBase()
  local curheight = 0
  while curheight < baseheight do
  	placeRing()
  end
 end

 buildBase()