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function forward()
    turtle.placeDown()
        turtle.forward()
    turtle.placeDown()
        turtle.forward()
    turtle.placeDown()
        turtle.forward()
    turtle.placeDown()
        turtle.forward()
    turtle.placeDown()
        turtle.forward()
    turtle.placeDown()
        turtle.forward()
    turtle.placeDown()
        turtle.forward()
    turtle.placeDown()
        turtle.forward()
    turtle.placeDown()
end
function back()
    turtle.turnRight()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.turnRight()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.turnLeft()
    turtle.turnLeft()
end

forward()
turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
    forward()
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
forward()
turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
    forward()
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
forward()
turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
    forward()
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
forward()
turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
    forward()
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
forward()
back()