write("Distance: ")

local d=tonumber(read())
print("Starting Tunnel")
while d > 0 do
turtle.forward()
turtle.placeDown()
turtle.turnLeft()
turtle.place()
turtle.up()
turtle.place()
turtle.placeUp()
turtle.turnRight()
turtle.turnRight()
turtle.place()
turtle.down()
turtle.place()
turtle.turnLeft()
d= d - 1
end
print("Finished")