createstairs

write("Number of stair groups: ")
local num = read()
local st = 0
local numSteps = 0
local returnToTop = "no"
for i=1,num do
  for ii=1,3 do
    turtle.forward()
    turtle.down()
    turtle.placeDown()
    if not turtle.placeDown() then
      print("Error - could not place block")
      print("Check fuel level or existing blocks")
      break
    end
  end
turtle.turnRight()
st = st+1
  if st == num then
    print(st.." stair(s) complete!")
  end
end

write("Return to top? (yes/no) ")
returnToTop = read()
if returnToTop == "yes" then
  numSteps = num*3
  print("Returning to top - "..numSteps.." stairs")
  turtle.turnRight()

  for i=1,numSteps do
    turtle.up()
    turtle.detect()
    if turtle.detect() then
      turtle.turnLeft()
    end
  turtle.forward()
  end
print("Return to top complete")
end