Step 1: Divide the number into separate digits:
00100 => 0 0 1 0 0
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
0 to 0 = 0
0 to 1 = 1
1 to 0 = 1
0 to 0 = 0
0 to 0 = 0
Step 3: Combine the filters to a string:
0 1 1 0 0 = 01100