Get all needed components.

Connect all components accordingly to this image.

Install PlatformIO IDE and Atom text editor.
To follow step by step PlatformIO installation and to see how to upload simple blinking LED program check this video.

Copy code bellow to main.cpp, connect NodeMCU to PC with micro USB cable and upload to NodeMCU.

#include <Arduino.h>

#define RED_LED 5

void setup() {
  // put your setup code here, to run once:

  pinMode(RED_LED, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:

  digitalWrite(RED_LED, HIGH);
  delay(1000);

  digitalWrite(RED_LED, LOW);
  delay(1000);

}

 And we are done.
That was simple, right?