def append(self, new_element):
    current = self.head
    if self.head:
        while current.next:
            current = current.next
        current.next = new_element
    else:
        self.head = new_element

def get_position(self, position):
    """Get an element from a particular position.
    Assume the first position is "1".
    Return "None" if position is not in the list."""
    first_element = self.head
    next_element = first_element
    if position < 1:
        return None
    for i in range(1, position):
        next_element = next_element.next
        if next_element is None:
            return None
    return next_element

def insert(self, new_element, position):
    """Insert a new node at the given position.
    Assume the first position is "1".
    Inserting at position 3 means between
    the 2nd and 3rd elements."""
    elem_at_pos = self.get_position(position)
    new_element.next = elem_at_pos
    if position == 1:
        self.head = new_element
    elif position > 1:
        self.get_position(position-1).next = new_element

def delete(self, value):
    """Delete the first node with a given value."""
    i = 1
    while self.get_position(i) is not None:
        elem_at_pos = self.get_position(i)
        if elem_at_pos is not None:
            if elem_at_pos.value == value:
                if i == 1:
                    self.head = elem_at_pos.next
                    elem_at_pos.next = None
                elif i > 1:
                    self.get_position(i-1).next = elem_at_pos.next
                    elem_at_pos.next = None
        i += 1