diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,212 +1,318 @@
 # Math_Lib
 
-**ENG**
-
-**!! JAVASCRIPT !!**
-
-Personal library created in JavaScript and Python for common use. In development...
-
-###################################################################
-
-To use as an NPM package, simply use npm i loganmatic.
-
-To import, use import Matematica from "loganmatic.js".
-
-Then, you can use it as follows:
-
-console.log(Matematica.NumeroEuler);
-console.log(Matematica.fatorar(100));
-
-If you are downloading the file, use:
-
-const Matematica = require("loganmatic.js");
-
-If the file is in the same directory.
-
-If you find any errors in the code, please send them to me. It will be of great help!
-
-Usage example:
-
-console.log(Matematica.fatorial(4));
-console.log(Matematica.NumeroEuler);
-console.log(Matematica.fatorar(100));
-console.log(Matematica.Pi);
-console.log(Matematica.modulo(-4));
-console.log(Matematica.fatorial(4));
-console.log(Matematica.raizDePrimeiroGrau(2, 1));
-console.log(Matematica.raizDeSegundoGrau(1,2,-3));
-console.log(Matematica.raizCubica(8));
-console.log(Matematica.raizQuadrada(9));
-console.log(Matematica.numeroAleatorioEntre(10, 20));
-console.log(Matematica.cosseno(0));
-console.log(Matematica.seno(Matematica.Pi));
-
-Output:
-2.7182818284590455
-[2, 2, 5, 5]
-3.141592653589793
-4
-24
--0.5
-[1, -3]
-2
-3
-17
-1
-0
-
-###################################################################
-
-!! PYTHON !!
-
-To use as a PIP package, simply use pip install loganmatic.
-
-To import, use from loganmatic import Calculadora.
-
-Then, Matematica = Calculadora().
-
-Then, you can use it as follows:
-
-print(Matematica.NumeroEuler)
-print(Matematica.fatorar(100))
-print(Matematica.Pi)
-print(Matematica.modulo(-4))
-print(Matematica.fatorial(4))
-print(Matematica.raiz_de_primeiro_grau(2, 1))
-print(Matematica.raizDeSegundoGrau(1,2,-3))
-print(Matematica.raizCubica(8))
-print(Matematica.raizQuadrada(9))
-print(Matematica.numero_aleatorio_entre(10, 20))
-
-The last two have problems with float values:
-print(Matematica.cosseno(0))
-print(Matematica.seno(0))
-
-Output:
-2.7182818284590455
-[2, 2, 5, 5]
-3.141592653589793
-4
-24
--0.5
-[1.0, -3.0]
-2.0
-3.0
-11
-1.0
-0
-
-########################################################
-
-The library calculates (currently) the values of PI and Euler's Number, calculates functions such as sine and cosine, factors a number, calculates the factorial of a number, computes the modulus, generates a random number between two given numbers, calculates cubic and square roots, and solves first and second-degree equations.
-
-Made by Gabriel Lima.
-
-
-#####################################################################
-
-**PT-BR**
-Biblioteca pessoal criada em JavaScript e Python para uso comum. Em desenvolvimento... 
-
-###################################################################
-
-** !! JAVASCRIPT !! **
-
-para usar como pacote NPM so usar **npm i loganmatic**
-
-e para importar utilize **import Matematica from "loganmatic.js"**
-
-depois somente utilizar 
-
-console.log(Matematica.NumeroEuler) 
-console.log(Matematica.fatorar(100))
-
-Se for baixar o arquivo use: 
-
-**const Matematica = require("loganmatic.js")** se o arquivo estiver no mesmo diretorio
-
-Se acharem erros no codigo, me enviem por favor, será de grande ajuda !!!
-
-exemplo de uso: **console.log(Matematica.fatorial(4))**
-
-console.log(Matematica.NumeroEuler) 
-console.log(Matematica.fatorar(100))
-console.log(Matematica.Pi)
-console.log(Matematica.modulo(-4))
-console.log(Matematica.fatorial(4))
-console.log(Matematica.raizDePrimeiroGrau(2, 1))
-console.log(Matematica.raizDeSegundoGrau(1,2,-3))
-console.log(Matematica.raizCubica(8))
-console.log(Matematica.raizQuadrada(9))
-console.log(Matematica.numeroAleatorioEntre(10, 20)) 
-console.log(Matematica.cosseno(0))
-console.log(Matematica.seno(Matematica.Pi))
-
-retorna: 
-
-2.7182818284590455
-[ 2, 2, 5, 5 ]
-3.141592653589793
-4
-24
--0.5
-[ 1, -3 ]
-2
-3
-17
-1
-0
-
-###################################################################
-
-** !! PYTHON !! **
-
-para usar como pacote PIP so usar **pip install loganmatic**
-
-e para importar utilize **from loganmatic import Calculadora**
-
-depois **Matematica = Calculadora()**
-
-depois somente utilizar 
-
-print(Matematica.NumeroEuler)
-print(Matematica.fatorar(100))
-print(Matematica.Pi)
-print(Matematica.modulo(-4))
-print(Matematica.fatorial(4))
-print(Matematica.raiz_de_primeiro_grau(2, 1))
-print(Matematica.raizDeSegundoGrau(1,2,-3))
-print(Matematica.raizCubica(8))
-print(Matematica.raizQuadrada(9))
-print(Matematica.numero_aleatorio_entre(10, 20))
-
-# Essas duas ultimas estão com problema para valores float... 
-print(Matematica.cosseno(0))
-print(Matematica.seno(0))
-
-retorna: 
-
-2.7182818284590455
-[2, 2, 5, 5]
-3.141592653589793
-4
-24
--0.5
-[1.0, -3.0]
-2.0
-3.0
-11
-1.0
-0
-
-########################################################
-
-A biblioteca calcula (atualmente) o valor de PI e do Numero de Euler ||
-Calcula Funções: Seno, Cosseno ||
-fatora um numero || 
-calcula o fatorial de um numero || 
-o modulo || 
-gera um numero aleatorio entre 2 numeros || 
-calcula raizes cubicas e quadrada e calcula as raizes de equações de primeiro e segundo grau
-
-Feito por **Gabriel Lima**
+<!DOCTYPE html>
+<html lang="pt-br">
+<head>
+  <meta charset="UTF-8">
+  <title>Biblioteca Pessoal - Gabriel Lima</title>
+  <style>
+    body {
+      font-family: Arial, sans-serif;
+      margin: 20px;
+    }
+    h1 {
+      font-size: 24px;
+      margin-bottom: 10px;
+    }
+    p {
+      margin-top: 0;
+    }
+    code {
+      display: block;
+      background-color: #f4f4f4;
+      padding: 10px;
+      margin-bottom: 10px;
+    }
+    .section {
+      margin-top: 30px;
+    }
+    .change-language-btn {
+      background-color: #4CAF50;
+      border: none;
+      color: white;
+      padding: 10px 20px;
+      text-align: center;
+      text-decoration: none;
+      display: inline-block;
+      font-size: 16px;
+      cursor: pointer;
+      border-radius: 4px;
+      transition: background-color 0.3s ease;
+    }
+    .change-language-btn:hover {
+      background-color: #45a049;
+    }
+  </style>
+</head>
+  <body>
+    <div id="pt-br" style="display: none;">
+      <h1>Biblioteca pessoal criada em JavaScript e Python</h1>
+      <p>para uso comum. Em desenvolvimento...</p>
+      <button onclick="changeLang()" class="change-language-btn">switch to english</button>
+      <div class="section">
+        <h2>JavaScript</h2>
+        <p>Para usar como pacote NPM, execute o seguinte comando:</p>
+        <code>npm i loganmatic</code>
+        <p>E para importar, utilize:</p>
+        <code>import Matematica from "loganmatic.js"</code>
+        <p>Ou</p>
+        <code>const Matematica = require("loganmatic.js");</code>
+        <p>Se o arquivo estiver no mesmo diretório</p>
+        <p>Exemplo de uso:</p>
+        <code>
+          console.log(Matematica.NumeroEuler);<br>
+          console.log(Matematica.fatorar(100));
+        </code>
+        <p>Retorno:</p>
+        <code>
+          2.7182818284590455<br>
+          [ 2, 2, 5, 5 ]
+        </code>
+        <div class="section">
+          <h2>Exemplo de Uso</h2>
+          <p>Se acharem erros no código, me enviem, por favor. Será de grande ajuda!</p>
+          <p>Exemplo de uso:</p>
+          <code>
+            console.log(Matematica.fatorial(4));<br>
+            console.log(Matematica.NumeroEuler);<br>
+            console.log(Matematica.fatorar(100));<br>
+            console.log(Matematica.Pi);<br>
+            console.log(Matematica.modulo(-4));<br>
+            console.log(Matematica.fatorial(4));<br>
+            console.log(Matematica.raizDePrimeiroGrau(2, 1));<br>
+            console.log(Matematica.raizDeSegundoGrau(1, 2, -3));<br>
+            console.log(Matematica.raizCubica(8));<br>
+            console.log(Matematica.raizQuadrada(9));<br>
+            console.log(Matematica.numeroAleatorioEntre(10, 20));<br>
+            console.log(Matematica.cosseno(0));<br>
+            console.log(Matematica.seno(Matematica.Pi));
+          </code>
+          <p>Retorna:</p>
+          <code>
+            2.7182818284590455<br>
+            [ 2, 2, 5, 5 ]<br>
+            3.141592653589793<br>
+            4<br>
+            24<br>
+            -0.5<br>
+            [ 1, -3 ]<br>
+            2<br>
+            3<br>
+            17<br>
+            1<br>
+            0
+          </code>
+        </div>
+      </div>
+      <div class="section">
+        <h2>Python</h2>
+        <p>Para usar como pacote PIP, execute o seguinte comando:</p>
+        <code>pip install loganmatic</code>
+        <p>E para importar, utilize:</p>
+        <code>from loganmatic import Calculadora</code>
+        <p>Exemplo de uso:</p>
+        <code>
+          Matematica = Calculadora()<br>
+          print(Matematica.NumeroEuler)<br>
+          print(Matematica.fatorar(100))
+        </code>
+        <p>Retorno:</p>
+        <code>
+          2.7182818284590455<br>
+          [2, 2, 5, 5]
+        </code>
+        <div class="section">
+          <h2>Exemplo de Uso em Python</h2>
+          <p>Exemplo de uso:</p>
+          <code>
+            print(Matematica.NumeroEuler)<br>
+            print(Matematica.fatorar(100))<br>
+            print(Matematica.Pi)<br>
+            print(Matematica.modulo(-4))<br>
+            print(Matematica.fatorial(4))<br>
+            print(Matematica.raiz_de_primeiro_grau(2, 1))<br>
+            print(Matematica.raizDeSegundoGrau(1, 2, -3))<br>
+            print(Matematica.raizCubica(8))<br>
+            print(Matematica.raizQuadrada(9))<br>
+            print(Matematica.numero_aleatorio_entre(10, 20))<br>
+            print(Matematica.cosseno(0))<br>
+            print(Matematica.seno(0))
+          </code>
+          <p>Retorna:</p>
+          <code>
+            2.7182818284590455<br>
+            [2, 2, 5, 5]<br>
+            3.141592653589793<br>
+            4<br>
+            24<br>
+            -0.5<br>
+            [1.0, -3.0]<br>
+            2.0<br>
+            3.0<br>
+            11<br>
+            1.0<br>
+            0
+          </code>
+          <p>Observação: As duas últimas linhas apresentam problemas para valores float.</p>
+        </div>        
+      </div>
+      <div class="section">
+        <h2>Funcionalidades</h2>
+        <p>A biblioteca calcula (atualmente) o valor de PI e do Número de Euler. Além disso, realiza as seguintes operações:</p>
+        <ul>
+          <li>Calcula funções: Seno, Cosseno</li>
+          <li>Fatora um número</li>
+          <li>Calcula o fatorial de um número</li>
+          <li>Calcula o módulo</li>
+          <li>Gera um número aleatório entre 2 números</li>
+          <li>Calcula raízes cúbicas e quadradas</li>
+          <li>Calcula as raízes de equações de primeiro e segundo grau</li>
+        </ul>
+      </div>
+      <div class="section">
+        <p>Feito por Gabriel Lima</p>
+      </div>
+    </div>
+    <div id="eng" style="display: block;">
+      <h1>Personal library created in JavaScript and Python</h1>
+      <p>for common use. Under development...</p>
+      <button onclick="changeLang()" class="change-language-btn">Mudar para português</button>
+      <div class="section">
+        <h2>JavaScript</h2>
+        <p>To use as an NPM package, execute the following command:</p>
+        <code>npm i loganmatic</code>
+        <p>And to import, use:</p>
+        <code>import Matematica from "loganmatic.js"</code>
+        <p>Or</p>
+        <code>const Matematica = require("loganmatic.js");</code>
+        <p>If the file is in the same directory</p>
+        <p>Usage example:</p>
+        <code>
+          console.log(Matematica.NumeroEuler);<br>
+          console.log(Matematica.fatorar(100));
+        </code>
+        <p>Returns:</p>
+        <code>
+          2.7182818284590455<br>
+          [ 2, 2, 5, 5 ]
+        </code>
+        <div class="section">
+          <h2>Usage Example</h2>
+          <p>If you find any errors in the code, please send them to me. It will be greatly appreciated!</p>
+          <p>Usage example:</p>
+          <code>
+            console.log(Matematica.fatorial(4));<br>
+            console.log(Matematica.NumeroEuler);<br>
+            console.log(Matematica.fatorar(100));<br>
+            console.log(Matematica.Pi);<br>
+            console.log(Matematica.modulo(-4));<br>
+            console.log(Matematica.fatorial(4));<br>
+            console.log(Matematica.raizDePrimeiroGrau(2, 1));<br>
+            console.log(Matematica.raizDeSegundoGrau(1, 2, -3));<br>
+            console.log(Matematica.raizCubica(8));<br>
+            console.log(Matematica.raizQuadrada(9));<br>
+            console.log(Matematica.numeroAleatorioEntre(10, 20));<br>
+            console.log(Matematica.cosseno(0));<br>
+            console.log(Matematica.seno(Matematica.Pi));
+          </code>
+          <p>Returns:</p>
+          <code>
+            2.7182818284590455<br>
+            [ 2, 2, 5, 5 ]<br>
+            3.141592653589793<br>
+            4<br>
+            24<br>
+            -0.5<br>
+            [ 1, -3 ]<br>
+            2<br>
+            3<br>
+            17<br>
+            1<br>
+            0
+          </code>
+        </div>
+      </div>
+      <div class="section">
+        <h2>Python</h2>
+        <p>To use as a PIP package, execute the following command:</p>
+        <code>pip install loganmatic</code>
+        <p>And to import, use:</p>
+        <code>from loganmatic import Calculadora</code>
+        <p>Usage example:</p>
+        <code>
+          Matematica = Calculadora()<br>
+          print(Matematica.NumeroEuler)<br>
+          print(Matematica.fatorar(100))
+        </code>
+        <p>Returns:</p>
+        <code>
+          2.7182818284590455<br>
+          [2, 2, 5, 5]
+        </code>
+        <div class="section">
+          <h2>Usage Example in Python</h2>
+          <p>Usage example:</p>
+          <code>
+            print(Matematica.NumeroEuler)<br>
+            print(Matematica.fatorar(100))<br>
+            print(Matematica.Pi)<br>
+            print(Matematica.modulo(-4))<br>
+            print(Matematica.fatorial(4))<br>
+            print(Matematica.raiz_de_primeiro_grau(2, 1))<br>
+            print(Matematica.raizDeSegundoGrau(1, 2, -3))<br>
+            print(Matematica.raizCubica(8))<br>
+            print(Matematica.raizQuadrada(9))<br>
+            print(Matematica.numero_aleatorio_entre(10, 20))<br>
+            print(Matematica.cosseno(0))<br>
+            print(Matematica.seno(0))
+          </code>
+          <p>Returns:</p>
+          <code>
+            2.7182818284590455<br>
+            [2, 2, 5, 5]<br>
+            3.141592653589793<br>
+            4<br>
+            24<br>
+            -0.5<br>
+            [1.0, -3.0]<br>
+            2.0<br>
+            3.0<br>
+            11<br>
+            1.0<br>
+            0
+          </code>
+          <p>Note: The last two lines have problems with float values.</p>
+        </div>
+      </div>
+      <div class="section">
+        <h2>Features</h2>
+        <p>The library calculates (currently) the value of PI and Euler's number. It also performs the following operations:</p>
+        <ul>
+          <li>Calculates functions: Sine, Cosine</li>
+          <li>Factors a number</li>
+          <li>Calculates the factorial of a number</li>
+          <li>Calculates the modulus</li>
+          <li>Generates a random number between two numbers</li>
+          <li>Calculates cubic and square roots</li>
+          <li>Calculates the roots of first and second-degree equations</li>
+        </ul>
+      </div>
+      <div class="section">
+        <p>Made by Gabriel Lima</p>
+      </div>
+    </div>
+    <script>
+      function changeLang(){
+        const eng = document.querySelector('#eng');
+        const ptBr = document.querySelector('#pt-br');
+        if (ptBr.style.display === 'none') {
+          ptBr.style.display = 'block';
+          eng.style.display = 'none';
+        } else {
+          eng.style.display = 'block';
+          ptBr.style.display = 'none';
+        }
+      }
+    </script>
+  </body>
+</html>