Pasted

--Replaces a floor of 16x64 area
function replaceRow()
  for i = 1,63 do
    turtle.forward()
    turtle.digDown()
    turtle.placeDown()
  end
end
 
for j = 1,8 do
  turtle.select((2*j-1))
  turtle.digDown()
  turtle.placeDown()
  replaceRow()
  turtle.turnRight()
  turtle.forward()
  turtle.turnRight()
  turtle.select((2*j))
  turtle.digDown()
  turtle.placeDown()
  replaceRow()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnLeft()
end