The objective of my project is that the 4-bit counter which has a range of 0-9, counts to the desired binary number using outside dip switches then returns to the beginning again.

This is what I have come up with so far but I am a bit puzzled. How can I implement the dip switches into the circuit, also how can make it count back to zero after displaying the desired number?

U1 70 1 . B 2- 6 D 41 BI/RBO 5 RBI 3 LT QA QB QC QD QE QF QG 13 12 11 10 9 - 15 14 1 7448 U5 NAND U3:A U3:B 7473 44:A 7473 U4:B 7473 7473 a 14 112 19 7J 14 12 71 J 19 J J U3:A(CLK) 1 CLK 102 50 Ame CLK CLK CLK 30 10 31 al 18 105 a-13 a 13 K , 18 K 2 CC I # 19