Using a list from first to last entry or last to first by removing items on the list

LISTexample.py

"""
Demonstration:
How to remove elements one at a time from a list.
front to rear, then rear to front 
"""
from time import sleep
ID = [750,771,772,1000,1077,1099,1110,1277,1499,  2000, 20050, 20167]
count = 0
inc = len(ID)
while count < inc:
    for start in ID:
        sleep(.1)
        print start,
        
    del ID[-1];print "\n"
    count =count+1
count = count +1
ID = [750,771,772,1000,1077,1099,1110,1277,1499, 2000, 20050, 20167]
count = 0
inc = len(ID)
while count < inc:
    for start in ID:
        sleep(.1)
        print start,

    del ID[-inc+count]
    print "\n"
    count =count+1