ifContinue=true
Detection=false
turtle.select(1)
Torch=false
Islot=1
print "Is the next turn left or right?"
print "Type 1 for right, type 2 for left"
Turn=io.read()
function detectFunc()
  if turtle.detect() then
    turtle.select(16)
    if turtle.compare() then
      Detection=false
      Torch=true
    else
      Detection=true
   end
   turtle.select(Islot)
 else
   Detection=false
 end
end
function mainFunc()
  if turtle.getItemCount(Islot)==1 then
    if Islot>7 then
      ifContinue=false
      print "Out of blocks"
    else
      Islot=Islot+1
      turtle.select(Islot)
    end
  else
    detectFunc()
    if Torch then
      turtle.dig()
      Torch=false
    end
    if Detection then
      if turtle.detectDown() then
        turtle.digDown()
      end
      turtle.placeDown()
      if Turn==1 then
        turtle.turnRight()
        detectFunc()
        if detection then
          ifContinue=false
          print "Blocked up ahead"
        else
          if Torch then
            turtle.dig()
            Torch=false
          end
          turtle.forward()
          turtle.turnRight()
          Turn=2
        end
      else
        turtle.turnLeft()
        detectFunc()
        if detection then
          ifContinue=false
          print "Blocked up ahead"
        else
          if Torch then
            turtle.dig()
            Torch=false
          end
          turtle.forward()
          turtle.turnLeft()
          Turn=1
        end
      end
    else
      if turtle.detectDown() then
        turtle.digDown()
      end
      turtle.placeDown()
      turtle.forward()
    end
  end
end
ifContinue = true
while ifContinue do
  mainFunc()
end