Bridge

--3 wide Bridge by SparkVGX

--Var
continue = true
lane = 1
distance = 0
tLeft = false

--Place down
func pDown()
  if turtle.detectDown() == false then
   if turtle.placeDown() == false then
     print("Need blocks")
     sleep(5)
     pDown()
   end
  end
end

func turn()
  if tLeft then
    turtle.turnLeft()
    turtle.forward()
    turtle.turnLeft()
  end
  else
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
  end
  tLeft = not tLeft
end

func Lane()
  if lane == 1
    while turtle.detect() == false do
      pDown()
      turtle.forward()
      distance = distance + 1
      lane = lane + 1
    end
  end
  else if lane ~= 1
    for i=0,distance
      pDown()
      turtle.forward()
    end
  end
end

func goHome()
  turtle.turnLeft()
  turtle.forward(2)
  turtle.turnLeft()

  for i=0,distance do
    turtle.forward()
  end
end


Lane()
turn()
Lane()
turn()
Lane()
goHome()