Pyramid Builder

print("Loading Robust Turtle API...")
local load = os.loadAPI("t")
if load then
  print("Robust Turtle API loaded.")
else
 print("Robust Turtle API not found in the root directory with filename t")
 print("Attempting to download as t from pastebin...")
 os.sleep(2)
 local response = http.get("http://pastebin.com/raw.php?i= e0UksEtT")
 if response then
    print("Great Success.")
    local data = response.readAll()
    response.close()
    local file = fs.open("t", "w")
    file.write(data)
    file.close()
    print("Downloaded as t")
    load = os.loadAPI("t")
    if load then
     print("Robust Turtle API installed & loaded.")
    end
 else
    print( "Download Failed. Please Install Manually." )
    return
 end
end


--pyramid builder turtle. does not hollow it out.


term.clear()
term.setCursorPos(1,1)
print([[Place Blocks starting in slot 1.
How tall will the pyramid be?]])
local size = 2*t.readNum()
for a=size,1, -2 do
  for b=1,4 do
    t.forward()
    t.placeRow("down", "forward", a, 1,8)
    t.right()
  end
  t.up()
  t.strafeRight()
  t.forward()
end
t.placeDown(1,8)