local distance = 0
local answer = 0
local answer2 = 0

function intro()
	print ("hello, how long would you like the tunnel to be?")
 	answer = read()
	print ("how many strips?")
	answer2 = read()
 	print ("starting...")
end

function strips()
repeat
	dig()
	distance = distance + 1
until distance == answer
	turn.back()
  end
end

function dig()
  turtle.dig()
  turtle.forward()
  turtle.digUp()
end

function next()
	turtle.turnRight()
	turtle.forward()
	turtle.forward()
	turtle.turnRight()
end

function turn.back()
  turtle.turnRight()
  turtle.turnRight()
 end
  if distance == 0 then
	next()
  else
	turtle.moveforward()
	distance = distance - 1
 end
end

intro()
strips()