#include <Servo.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h> 
#include <ESP8266WebServer.h>
int modo = 0;
String html = R"***(
<!DOCTYPE html>
<html>
  <head>    
    <title>SHOW SACK</title>
  </head>
  <body>
    <h1>MODOS</h1>
    <p><a href=/MODO1>MODO 1</a></p>
    <p><a href=/MODO2>MODO 2</a></p>
    <p><a href=/MODO3>MODO 3</a></p>
  </body>
</html>
)***";
//--------------------------------------
const char* ssid = "SHOW SACK";
IPAddress IPaddr (192, 168, 168, 168);
IPAddress IPmask(255, 255, 255, 0);
ESP8266WebServer server(80);
//--------------------------------------
void handleRoot()
{
  server.send(200, "text/html", html);
}
void mode1()
{
  modo=1;
  server.send(200, "text/html", html);
}
void mode2()
{
  modo=2;
  server.send(200, "text/html", html);
}
void mode3()
{
  modo=3;
  server.send(200, "text/html", html);
}
//===============================================
Servo servo1;
Servo servo2;
Servo servo3;
Servo servo4;

unsigned long previousMillis = 0;
const long interval = 500;
int cycle = 0;
int boton = 16;      
int estadoboton = 0;
void setup() {
  servo1.attach(12);
  servo2.attach(13);
  servo3.attach(2);//       
  servo4.attach(4);
  pinMode(boton, INPUT_PULLUP);
  
pinMode(LED_BUILTIN, OUTPUT);

  WiFi.softAP(ssid);
  WiFi.softAPConfig(IPaddr, IPaddr, IPmask); 
  IPAddress myIP = WiFi.softAPIP();
  server.on("/", handleRoot);
  server.on("/MODO1", mode1);
  server.on("/MODO2", mode2);
  server.on("/MODO3", mode3);
  server.begin();
  Serial.println("HTTP server started");
}

void loop() {
server.handleClient();
  switch (modo) {
    case 0:
    estadoboton =digitalRead(boton);
    if (estadoboton == LOW) {
      delay(200);
      modo = 1;
    }
    break;

    case 1:
    {
      digitalWrite(LED_BUILTIN, HIGH);//---------------------------------------
      estadoboton =digitalRead(boton);
    if (estadoboton == LOW) {
      delay(200);
      modo = 2;
    }
      unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    if (cycle == 0) {
      servo1.write(0);
      servo2.write(0);
      servo3.write(180);
      servo4.write(180);
      cycle = 1;
    } else {
      servo1.write(150);
      servo2.write(150);
      servo3.write(30);
      servo4.write(30);
      cycle = 0;
    }
  }
      }
    break;

    case 2:
    {
      digitalWrite(LED_BUILTIN, LOW);//--------------------------------------
      estadoboton =digitalRead(boton);
    if (estadoboton == LOW) {
      delay(200);
      modo = 3;
    }
      unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    if (cycle == 0) {
      servo1.write(0);
      servo2.write(0);
      servo3.write(30);
      servo4.write(30);
      cycle = 1;
    } else {
      servo1.write(150);
      servo2.write(150);
      servo3.write(180);
      servo4.write(180);
      cycle = 0;
    }
  }
    }
    break;
      
  

    case 3:
    {
      estadoboton =digitalRead(boton);
    if (estadoboton == LOW) {
      delay(200);
      modo = 4;
    }
     unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    if (cycle == 0) {
      servo1.write(0);
      servo2.write(150);
      servo3.write(30);
      servo4.write(180);
      digitalWrite(LED_BUILTIN, HIGH);
      cycle = 1;
    } else {
      servo1.write(120);
      servo2.write(60);
      servo3.write(120);
      servo4.write(60);
      digitalWrite(LED_BUILTIN, LOW);
      cycle = 0;
    }
  }
    }
   
    break; 

    case 4: 
    servo1.write(0);
      servo2.write(0);
      servo3.write(180);
      servo4.write(180);
      delay(1000);
      modo = 0;
      break;
      
  }
  
}
The final project code
