Write a function unique to find all the unique elements of a list.

Write a function unique to find all the unique elements of a list.

def unique(lst):
    unique_list = []

    for item in lst:
        if item not in unique_list:
            unique_list.append(item)

    return unique_list


# Main Program
list1 = [10, 20, 10, 30, 40, 20, 50, 30]

print("Original List:", list1)
print("Unique Elements:", unique(list1))