Count Backwards from 1000 (part 4 & 5)

.................177.....................

.....1...7...6.....

..................175.....................

.....................174.......................... .

1...7...3...

...........172..........

.....................171..........................

.................................170.............. .........

.........................169................

................168.............................

.........................167.................

......................166.......................

.....1.....6.....5.....

.......164.............

163.....................................