ATtiny85 Burn Premade code.

Hi, I created a linear power supply as a project and hopefully a cheaper replacement for the extremely expensive ones. Consequently, I'm using an ATtiny85 to run an INA219. I want to burn this code GitHub - moononournation/ATtinyPowerMeter to the ATtiny85 so I don't have to connect an Arduino to it constantly. I was wondering how I can modify this code to program the ATtiny85 I've seen 20 threads on Inscrutables for burning but all of them have the Arduino remaining connected and each uses a different library. To be clear I want to connect an Arduino pro mini or similar Arduino to the ATtiny85 and use it to burn the code from that GitHub link onto the board. Any help is appreciated!

runaway_pancake:
High-Low Tech – Programming an ATtiny w/ Arduino 1.6 (or 1.0)

I saw this but can I just replace that code with the code I posted? I see that there is pinout options on that and I'm really not sure how to make it so in that github code it will burn properly to the ATtiny85.