from LinkedList import List 
def demo():
    myList = List()
    myList.dump()

    myList.addToBack(20)
    myList.addToFront(10)
    myList.addToBack(30)
    myList.addToBack(40)
    myList.dump()

    myList.removeLast()
    myList.dump()
    myList.removeFirst()
    myList.dump()
    myList.removeFirst()
    myList.removeFirst()
    myList.removeFirst()
    myList.dump()

    groceryList = List()
    groceryList.addToFront([1,2,3])
    groceryList.addToFront("bread")
    groceryList.dump()

    myList = List()
    myList.insert(80)
    myList.insert(95)
    myList.insert(100)
    myList.insert(75)
    myList.dump()
    myList.insert(100)
    myList.insert(60)
    myList.dump()