#include <Arduino.h>
#include <U8g2lib.h>
U8G2_SSD1306_128X64_NONAME_F_HW_I2C 
 u8g2(U8G2_R0,SCL,SDA,U8X8_PIN_NONE);
//2     LED
//21    SDA
//22    SCL
//18    WS2812 pin
//0     key
void setup()
{
    pinMode(2,OUTPUT);
    pinMode(0,INPUT);
    digitalWrite(2,HIGH);
    delayMicroseconds(1);
    digitalWrite(2,LOW);
    analogWrite(2,1);
    u8g2.begin();
}
void loop()
{
    
}