ソースコードの挿入実験

どうやったら良いのか分からなかったのでググったらQiitaにGoogle-code-prettifyというのがあったので、早速実験！
無事実行成功！　ただ、これだけでは足りなかったので、以下のCSS（元のページ）を追加して、max-heightを加えて縦横スクロールを追加。
これでやっとやりたいことが出来るようになった、、、。

/*
Google code-prettify
*/
pre.prettyprint
{
    border: 1px solid #cccccc !important;
    line-height: 1.5em;
    overflow: auto;
    width: auto;
    max-height: 600px;
    padding: 2em !important;
}
pre.prettyprint > ol.linenums
{
    padding-left: 2em;
}
pre.prettyprint > ol.linenums > li
{
    border-left: 1px solid #cccccc;
    margin-bottom: 0;
}
pre.prettyprint > ol.linenums > li.L0,
pre.prettyprint > ol.linenums > li.L1,
pre.prettyprint > ol.linenums > li.L2,
pre.prettyprint > ol.linenums > li.L3,
pre.prettyprint > ol.linenums > li.L4,
pre.prettyprint > ol.linenums > li.L5,
pre.prettyprint > ol.linenums > li.L6,
pre.prettyprint > ol.linenums > li.L7,
pre.prettyprint > ol.linenums > li.L8,
pre.prettyprint > ol.linenums > li.L9 
{
    list-style-type: decimal;
}
pre.prettyprint > ol.linenums > li.L1,
pre.prettyprint > ol.linenums > li.L3,
pre.prettyprint > ol.linenums > li.L5,
pre.prettyprint > ol.linenums > li.L7,
pre.prettyprint > ol.linenums > li.L9 
{
    background-color: transparent;
}
pre.prettyprint > ol.linenums > li span:first-child
{
    padding-left: 1em;
}
pre.prettyprint > ol.linenums > li span:last-child
{
    padding-right: 1em;
}
/* plain text */
pre.prettyprint .pln { color: #cccccc; }
/* string content */
pre.prettyprint .str { color: #cccc33; }
/* a keyword */
pre.prettyprint .kwd { color: #00cc00; }
/* a comment */
pre.prettyprint .com { color: #cc3366; }
/* a type name */
pre.prettyprint .typ { color: #00cc00; }
/* a literal value */
pre.prettyprint .lit { color: #3399cc; }
/* punctuation, lisp open bracket, lisp close bracket */
pre.prettyprint .pun,
pre.prettyprint .opn,
pre.prettyprint .clo
{ color: #cccccc; }
/* a markup tag name */
pre.prettyprint .tag { color: #3399cc; }
/* a markup attribute name */
pre.prettyprint .atn { color: #00cc00; }
/* a markup attribute value */
pre.prettyprint .atv { color: #cccc33; }
/* a declaration; a variable name */
pre.prettyprint .dec,
pre.prettyprint .var
{ color: #00cc00; }
/* a function name */
pre.prettyprint .fun { color: #cc66cc; }
 

/*
Deep Sleep with External Wake Up
=====================================
This code displays how to use deep sleep with
an external trigger as a wake up source and how
to store data in RTC memory to use it over reboots
This code is under Public Domain License.
Hardware Connections
======================
Push Button to GPIO 33 pulled down with a 10K Ohm
resistor
NOTE:
======
Only RTC IO can be used as a source for external wake
source. They are pins: 0,2,4,12-15,25-27,32-39.
Author:
Pranav Cherukupalli 
*/
#include "esp_deep_sleep.h"
#define BUTTON_PIN_BITMASK 0x8004 // GPIOs 2 and 15
//#define BUTTON_PIN_BITMASK BIT64(GPIO_NUM_34)|BIT64(GPIO_NUM_36)// GPIOs 34 and 36
unsigned long time0;
unsigned long time1;
RTC_DATA_ATTR int bootCount = 0;
/*
Method to print the reason by which ESP32
has been awaken from sleep
*/
void print_wakeup_reason(){
  time0 = micros();
  esp_sleep_wakeup_cause_t wakeup_reason;
  wakeup_reason = esp_sleep_get_wakeup_cause();
  switch(wakeup_reason)
  {
    case ESP_SLEEP_WAKEUP_EXT0 : Serial.println("Wakeup caused by external signal using RTC_IO"); break;
    case ESP_SLEEP_WAKEUP_EXT1 : Serial.println("Wakeup caused by external signal using RTC_CNTL"); break;
    case ESP_SLEEP_WAKEUP_TIMER : Serial.println("Wakeup caused by timer"); break;
    case ESP_SLEEP_WAKEUP_TOUCHPAD : Serial.println("Wakeup caused by touchpad"); break;
    case ESP_SLEEP_WAKEUP_ULP : Serial.println("Wakeup caused by ULP program"); break;
    default : Serial.printf("Wakeup was not caused by deep sleep: %d\n",wakeup_reason); break;
  }
  time1 = micros();
  Serial.print("==>print_wakeup_reason() : ");
  Serial.println( time1 -time0 );
}
/*
Method to print the GPIO that triggered the wakeup
*/
void print_GPIO_wake_up(){
  time0 = micros();
  int GPIO_reason = esp_sleep_get_ext1_wakeup_status();
  time1 = micros();
  Serial.print("GPIO that triggered the wake up: GPIO ");
  Serial.print( GPIO_reason );
  Serial.print( " : " );
  Serial.println((log(GPIO_reason))/log(2), 0);
  Serial.print("==> print_GPIO_wake_up() : ");
  Serial.println( time1 - time0 );
}
  
void setup(){
  Serial.begin(115200);
  delay(1000); //Take some time to open up the Serial Monitor
  //Increment boot number and print it every reboot
  ++bootCount;
  Serial.println("Boot number: " + String(bootCount));
  // Following 4 lines from http://wakwak-koba.hatenadiary.jp/entry/20170219/p1
  // to make deep sleep to 4 micro amp consumption, otherwise 27 micro amp?
  esp_deep_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_OFF);
  esp_deep_sleep_pd_config(ESP_PD_DOMAIN_RTC_SLOW_MEM, ESP_PD_OPTION_OFF);
  esp_deep_sleep_pd_config(ESP_PD_DOMAIN_RTC_FAST_MEM, ESP_PD_OPTION_OFF);
  esp_deep_sleep_pd_config(ESP_PD_DOMAIN_MAX, ESP_PD_OPTION_OFF);
  //Print the wakeup reason for ESP32
  print_wakeup_reason();
  //Print the GPIO used to wake up
  print_GPIO_wake_up();
  /*
  First we configure the wake up source
  We set our ESP32 to wake up for an external trigger.
  There are two types for ESP32, ext0 and ext1 .
  ext0 uses RTC_IO to wakeup thus requires RTC peripherals
  to be on while ext1 uses RTC Controller so doesnt need
  peripherals to be powered on.
  Note that using internal pullups/pulldowns also requires
  RTC peripherals to be turned on.
  */
  //esp_deep_sleep_enable_ext0_wakeup(GPIO_NUM_15,1); //1 = High, 0 = Low
  //If you were to use ext1, you would use it like
  esp_sleep_enable_ext1_wakeup(BUTTON_PIN_BITMASK,ESP_EXT1_WAKEUP_ANY_HIGH);
  //Go to sleep now
  Serial.println("Going to sleep now");
  delay(1000);
  esp_deep_sleep_start();
  Serial.println("This will never be printed");
}
void loop(){
  //This is not going to be called
}