Patterns In Single Digits Representations of Natural Numbers

In past author wrote natural numbers in terms of single digits. See example below:

The total work is done from 1 to 20000 in four parts. See the links below:

1. I.J. TANEJA, Single Digit Representations of Numbers From 1 to 5000, 
2. I.J. TANEJA, Single Digit Representations of Numbers From 5001 to 10000, 
3. I.J. TANEJA, Single Digit Representations of Numbers From 10001 to 15000;
4. I.J. TANEJA, Single Digit Representations of Numbers From 15001 to 20000;

The aim here is to write the numbers from 1 to 1000 in patterned form. It is done in the following work:

• Inder J. Taneja, Patterned Single Digits Representations of Natural Numbers, Zenodo, July 04, 2020, pp. 1-590, https://doi.org/10.5281/zenodo.3930382.

Below are few examples: