diff --git a/z2/app.py b/z2/app.py
deleted file mode 100644
index 97eed71..0000000
--- a/z2/app.py
+++ /dev/null
@@ -1,314 +0,0 @@
-from flask import Flask, render_template_string
-import math
-
-app = Flask(__name__)
-
-@app.route('/')
-def index():
-    # Calculate PI to 300 decimal places
-    # Since math.pi doesn't provide that many digits, we're using a string representation
-    # that includes the first 300 decimal places of PI
-    pi_digits = "3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989"
-    
-    # HTML template with embedded CSS and JavaScript
-    html_template = """
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-        <meta charset="UTF-8">
-        <meta name="viewport" content="width=device-width, initial-scale=1.0">
-        <title>PI Digits Visualization</title>
-        <style>
-            body {
-                font-family: 'Arial', sans-serif;
-                background: linear-gradient(135deg, #1a1a2e, #16213e);
-                color: #fff;
-                min-height: 100vh;
-                margin: 0;
-                display: flex;
-                flex-direction: column;
-                align-items: center;
-                justify-content: center;
-                text-align: center;
-                padding: 20px;
-            }
-            
-            .container {
-                max-width: 800px;
-                background-color: rgba(0, 0, 0, 0.3);
-                border-radius: 15px;
-                padding: 30px;
-                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
-            }
-            
-            h1 {
-                color: #4cc9f0;
-                font-size: 2.5rem;
-                margin-bottom: 20px;
-                text-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
-            }
-            
-            .pi-display {
-                font-family: 'Courier New', monospace;
-                font-size: 2rem;
-                letter-spacing: 2px;
-                margin: 20px 0;
-                min-height: 60px;
-                display: flex;
-                flex-wrap: wrap;
-                justify-content: center;
-                max-height: 300px;
-                overflow-y: auto;
-                padding: 10px;
-            }
-            
-            .digit {
-                padding: 5px;
-                margin: 2px;
-                border-radius: 5px;
-                display: inline-block;
-                opacity: 0;
-                transform: scale(0.5);
-                transition: transform 0.3s ease, opacity 0.3s ease;
-            }
-            
-            .digit.visible {
-                opacity: 1;
-                transform: scale(1);
-            }
-            
-            .decimal {
-                color: #f72585;
-                font-weight: bold;
-                font-size: 2.2rem;
-            }
-            
-            .controls {
-                margin-top: 30px;
-                display: flex;
-                justify-content: center;
-                gap: 20px;
-                flex-wrap: wrap;
-            }
-            
-            button {
-                background-color: #4361ee;
-                color: white;
-                border: none;
-                padding: 12px 25px;
-                border-radius: 30px;
-                cursor: pointer;
-                font-size: 1rem;
-                transition: background-color 0.3s, transform 0.2s;
-                box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
-            }
-            
-            button:hover {
-                background-color: #4cc9f0;
-                transform: translateY(-3px);
-            }
-            
-            button:active {
-                transform: translateY(1px);
-            }
-            
-            .speed-control {
-                margin-top: 20px;
-                display: flex;
-                flex-direction: column;
-                align-items: center;
-            }
-            
-            .speed-label {
-                margin-bottom: 10px;
-                color: #4cc9f0;
-            }
-            
-            .info {
-                margin-top: 30px;
-                font-size: 1rem;
-                color: #ccc;
-            }
-            
-            .counter {
-                font-size: 1.2rem;
-                color: #4cc9f0;
-                margin-top: 20px;
-            }
-            
-            @media (max-width: 600px) {
-                .pi-display {
-                    font-size: 1.5rem;
-                    max-height: 200px;
-                }
-                h1 {
-                    font-size: 1.8rem;
-                }
-                .controls {
-                    flex-direction: column;
-                    gap: 10px;
-                }
-                button {
-                    width: 100%;
-                }
-            }
-        </style>
-    </head>
-    <body>
-        <div class="container">
-            <h1>PI Digits Visualization</h1>
-            
-            <div class="pi-display" id="pi-display"></div>
-            
-            <div class="counter">Digits displayed: <span id="counter">0</span> / 1002 </div>
-            
-            <div class="controls">
-                <button id="start-btn">Start</button>
-                <button id="pause-btn">Pause</button>
-                <button id="reset-btn">Reset</button>
-                <button id="speed-up-btn">Speed Up</button>
-                <button id="slow-down-btn">Slow Down</button>
-            </div>
-            
-            <div class="speed-control">
-                <div class="speed-label">Current speed: <span id="speed-value">0.5</span> seconds per digit</div>
-            </div>
-            
-            <div class="info">
-                <p>PI digits are displayed one by one with a unique color for each digit.</p>
-            </div>
-        </div>
-        
-        <script>
-            // First 300 decimal places of PI
-            const PI_DIGITS = "{{ pi_digits }}";
-            let currentIndex = 0;
-            let animationInterval;
-            let isPlaying = false;
-            let displaySpeed = 500; // milliseconds (0.5 seconds)
-            
-            const piDisplay = document.getElementById('pi-display');
-            const counter = document.getElementById('counter');
-            const startBtn = document.getElementById('start-btn');
-            const pauseBtn = document.getElementById('pause-btn');
-            const resetBtn = document.getElementById('reset-btn');
-            const speedUpBtn = document.getElementById('speed-up-btn');
-            const slowDownBtn = document.getElementById('slow-down-btn');
-            const speedValue = document.getElementById('speed-value');
-            
-            // Generate a random color from a predefined palette
-            function getRandomColor() {
-                const colors = [
-                    '#f72585', '#b5179e', '#7209b7', '#560bad', 
-                    '#480ca8', '#3a0ca3', '#3f37c9', '#4361ee', 
-                    '#4895ef', '#4cc9f0', '#80ffdb', '#72efdd', 
-                    '#64dfdf', '#56cfe1', '#48bfe3', '#4ea8de'
-                ];
-                return colors[Math.floor(Math.random() * colors.length)];
-            }
-            
-            // Add a digit to the display
-            function addDigit() {
-                if (currentIndex < PI_DIGITS.length) {
-                    const digit = PI_DIGITS[currentIndex];
-                    const digitElement = document.createElement('span');
-                    
-                    digitElement.textContent = digit;
-                    digitElement.className = 'digit';
-                    if (digit === '.') {
-                        digitElement.classList.add('decimal');
-                    } else {
-                        digitElement.style.color = getRandomColor();
-                    }
-                    
-                    piDisplay.appendChild(digitElement);
-                    
-                    // Appearance animation
-                    setTimeout(() => {
-                        digitElement.classList.add('visible');
-                    }, 50);
-                    
-                    currentIndex++;
-                    counter.textContent = currentIndex;
-                    
-                    // Auto-scroll to show the latest digits
-                    piDisplay.scrollTop = piDisplay.scrollHeight;
-                    
-                    // Auto-stop at the end
-                    if (currentIndex >= PI_DIGITS.length) {
-                        clearInterval(animationInterval);
-                        isPlaying = false;
-                    }
-                }
-            }
-            
-            // Start the animation
-            function startAnimation() {
-                if (!isPlaying && currentIndex < PI_DIGITS.length) {
-                    animationInterval = setInterval(addDigit, displaySpeed);
-                    isPlaying = true;
-                }
-            }
-            
-            // Pause
-            function pauseAnimation() {
-                clearInterval(animationInterval);
-                isPlaying = false;
-            }
-            
-            // Reset
-            function resetAnimation() {
-                pauseAnimation();
-                piDisplay.innerHTML = '';
-                currentIndex = 0;
-                counter.textContent = '0';
-            }
-            
-            // Speed up the animation
-            function speedUp() {
-                if (displaySpeed > 100) {
-                    displaySpeed -= 100;
-                    updateSpeed();
-                    if (isPlaying) {
-                        pauseAnimation();
-                        startAnimation();
-                    }
-                }
-            }
-            
-            // Slow down the animation
-            function slowDown() {
-                if (displaySpeed < 2000) {
-                    displaySpeed += 100;
-                    updateSpeed();
-                    if (isPlaying) {
-                        pauseAnimation();
-                        startAnimation();
-                    }
-                }
-            }
-            
-            // Update the speed display
-            function updateSpeed() {
-                speedValue.textContent = (displaySpeed / 1000).toFixed(1);
-            }
-            
-            // Event listeners
-            startBtn.addEventListener('click', startAnimation);
-            pauseBtn.addEventListener('click', pauseAnimation);
-            resetBtn.addEventListener('click', resetAnimation);
-            speedUpBtn.addEventListener('click', speedUp);
-            slowDownBtn.addEventListener('click', slowDown);
-            
-            // Add the first two digits automatically
-            addDigit(); // Adds "3"
-            addDigit(); // Adds "."
-        </script>
-    </body>
-    </html>
-    """
-    
-    return render_template_string(html_template, pi_digits=pi_digits)
-
-if __name__ == "__main__":
-    app.run(host='0.0.0.0', port=5000, debug=True)
\ No newline at end of file
