nodemcu esp8266 oled 0.91

#include <Wire.h>
#include "OLED.h"
// 0.91s OLED connection:
//SDA -- D4
//SCL -- D5
//RST -- D2
OLED display(SDA, SCL);
void setup() {
  pinMode(D2, OUTPUT);
  digitalWrite(D2, LOW);  // turn D2 low to reset OLED
  delay(50);
  digitalWrite(D2, HIGH);  // while OLED is running, must set D2 in high
  Serial.begin(9600);
  Serial.println("OLED test!");
  // Initialize display
  display.begin();
  // Test message
  display.print("Hello ");
  delay(3 * 1000);
  // Test long message
  display.print("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.");
  delay(3 * 1000);
  // Test display clear
  display.clear();
  delay(3 * 1000);
  // Test message postioning
  display.print("TOP-LEFT");
  display.print("4th row", 4);
  display.print("RIGHT-BOTTOM", 7, 4);
  delay(3 * 1000);
  // Test display OFF
  display.off();
  display.print("3rd row", 3, 8);
  delay(3 * 1000);
  // Test display ON
  display.on();
  delay(3 * 1000);
}
int r = 0, c = 0;
void loop() {
  r = r % 4;
  c = micros() % 6;
  if (r == 0) display.clear();
  display.print("Hello ", r++, c++);
  delay(500);
}