I want to run D3 and D4 LED's in loop continuously

I have two button "Pattern1" and "Pattern2" , I want to run 2 LED pattern by using esp8266 and web browser,  If I click on "Pattern1" button the first pattern of both LED’s should run in loop continuously, and when I click "Pattern2" button the second pattern should run in loop continuously until I click any other button.

My Code is:

#include <ESP8266WiFi.h>

const char* ssid = "MY_SSID";
const char* password = "MY_SSID_PASSWORD";

WiFiServer server(80);

#define LED1 D3
#define LED2 D4

void setup() {
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
 
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW);
 
  Serial.begin(115200);
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("NodeMCU is connected to WiFi");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
  server.begin();
  delay(3000);
}

void loop() {
  WiFiClient client;
  client = server.available();

 if (client == 1) {
    String request = client.readStringUntil('\n');
    client.flush();
    Serial.println(request);
    
    if (request.indexOf("pattern01") != -1)
    { pattern1();}           // This Pattern I want to run continuously until I click any other button on web page
 
    if (request.indexOf("pattern02") != -1)
    { pattern2();}           // This Pattern I want to run continuously until I click any other button on web page

 
    client.println("HTTP/1.1 200 OK");
    client.println("Content-Type: text/html");
    client.println("");
 
    client.println("<!DOCTYPE HTML>");
    client.println("<html>");
    client.println("<head>");
    client.println("<title> Led Pattern </title>");
    client.println("</head>");
    client.println("<body align= \"center\" >");
    client.println("<h3> <font size = \"20\" face = \"Verdana\" >  Led Pattern Continue Loop Control  </font> </h3> ");
    client.println("<p> <a href=\"/pattern01\"> <button style=\"height:60px; background-color: #195B6A; width:200px; cursor: pointer\"><b> Pattern 1 </b></button> <a> </font></p> ");
    client.println("<p> <a href=\"/pattern02\"> <button style=\"height:60px; background-color: #195B6A; width:200px; cursor: pointer\"><b> Pattern 2 </b></button> <a> </font></p> ");
    client.println("</body>");
    client.println("</html>");

    Serial.println("Client disonnected");
    Serial.println("------------------");
    Serial.println("                  ");
       
  }
}

void pattern1(){
              digitalWrite(LED1,HIGH);
              delay(50);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              delay(50);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              delay(50);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED2,LOW);
              delay(50);
              // I want to start the loop "Pattern 1" again
}

void pattern2(){
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
              digitalWrite(LED1,HIGH);
              digitalWrite(LED2,HIGH);
              delay(50);
              digitalWrite(LED1,LOW);
              digitalWrite(LED2,LOW);
              delay(50);
}

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