English: This graph shows a Collatz sequence ‘nibbling’ on trailing binary ones and zeroes, the bits in the x-axis labels after the space.

1. Even numbers have some dark grey, at least one trailing zero. A division by two decreases dark grey. Division ends at an odd number.
2. For odd numbers (*3+1)/2 decreases dark blue, the number of trailing ones.

Each set of computations ends with just 1 trailing one. The next set starts with an even number.

The light colours denote the number of non trailing digits, before the space in the x-axis labels. These are ‘hailstone’ digits impacted by (*3+1)/2.

The sequence ends with decreasing powers of two, with just one dark blue bit, no light colours.