Since it’s just a PNG, it is trivial to open it up in GIMP and copy and paste one bit of the circuit multiple times. The different color wires are mainly to help route in a 2d plane, as you don ...

Ternary Logic: A multi-valued logic system based on three distinct states, offering reduced circuit complexity and potentially lower quantum cost than binary systems.

This paper is to design 1-bit full subtractor by using CMOS180nm technology with reduced number of transistors and hence it is efficient in area, speed and power consumption.