Design a sequential circuit that cycles through the bcd powersof two (1,2,4,8) in increasing order. of the bcd numbers not used, send the even numbers to 1 and the odd numbers to 8. the circuitcan consiste of nand, not, d-flip flops, bdc-to-seven segmentdecoder, and 7-segment common cathode display.
i am not sure how to start the process if someone could get mestarted i would be grateful!

Write a program that keeps asking the user for new values to be added to a list until the user enters 'exit' ('exit' should not be added to the list). these values entered by the user are added to a list we call 'initial_list'. then write a function that takes this initial_list as input and returns another list with 3 copies of every value in the initial_list. finally, inside print out all of the values in the new list. for example: input: enter value to be added to list: a enter value to be added to list: b enter value to be added to list: c enter value to be added to list: exit output: a b c a b c a b c note how 'exit' is not added to the list. also, your program needs to be able to handle any variation of 'exit' such as 'exit', 'exit' etc. and treat them all as 'exit'.