The bar graph has 8 LEDs (LED0 to LED7), each connected to a GPIO pin on the ESP32. Two patterns are alternated in a loop:
Pattern 1: 0b01010101
LEDs ON: 0, 2, 4, 6 (Even positions)
LEDs OFF: 1, 3, 5, 7
Pattern 2: 0b10101010
LEDs ON: 1, 3, 5, 7 (Odd positions)
LEDs OFF: 0, 2, 4, 6
These patterns toggle every 500 milliseconds and continues indefinitely.