How To Program Attiny85 microchip - Tutorial in 3min
1.Arduino IDE from the official website https://www.arduino.cc/en/software
2.Next install Attiny85 boards go to File Preferences and in the
Additional Boards Manager URLs field, add the following URL
https://raw.githubusercontent.com/dam...
Click "OK" to close the preferences window.
3.Install the Attiny85 core: In the Arduino IDE, go to Tools Board Boards Manager.
Search for "attiny" and install the "Attiny by David A. Mellis" core.