Upgrade of chineese flashlight with attiny13 and Platformio

Upgrade of chineese flashlight with attiny13 and Platformio. Old microcontroller died. I decided to do some upgrade for internals of old flashlight. I used 2 PWM channel and 1 button with attached interrupt on it. First mode has 3 stages. 33%, 66% and 100% for ring LEDs, and second mode has 2 stage: 50% 100% of power central LED