1x2 (CC Turtle)

xr=read()
x=xr
x=x-1
xc=0
ct=0

turtle.select(16)
count = turtle.getItemCount(16)
if count > 0 then
 while xc<x do
  turtle.dig()
  ok = turtle.forward()
  if ok then
   turtle.digDown()
   if ct >= 8 then
    tok = turtle.placeDown()
    if tok then
     ct = 0
    end
   else
    ct=ct+1
   end
   xc=xc+1
  end
 end
 turtle.turnLeft() turtle.turnLeft()
 while xc>0 do
  ok = turtle.forward()
  if ok then xc=xc-1 end
 end
end