local component = require("component")
local computer = require("computer")
local robot = require("robot")
local shell = require("shell")
local sides = require("sides")

function placeRail()
robot.down()
if robot.detectDown() then
if robot.compareTo(robot.select() + 1) then
robot.placeDown()
else
robot.select(robot.select() + 1)
robot.placeDown()
end

while(true) do
robot.swing()
robot.forward()
robot.swingUp()
robot.swingDown()
robot.turnRight()
robot.swing()
robot.forward()
robot.swingUp()
robot.swingDown()
robot.swing()
robot.forward()
robot.swingUp()
robot.swingDown()
robot.turnLeft()
robot.swing()
robot.forward()
robot.swingUp()
robot.swingDown()
robot.turnLeft()
robot.swing()
robot.forward()
robot.swingUp()
robot.swingDown()
robot.swing()
placeRail()
robot.forward()
robot.swingUp()
robot.swingDown()
robot.turnRight()
end