Update script.js

script.js

@@ -10,17 +10,24 @@ document.addEventListener('DOMContentLoaded', () => {
     let testDuration = 15; // Duration in seconds
 
     function startTest() {
-        // Reset variables and UI elements
+        // Reset the test state
         clickCount = 0;
         cpsDisplay.textContent = 'CPS: 0.00';
         timerElement.textContent = testDuration;
-        clickButton.classList.add('white');
-        clickButton.textContent = clickCount;
 
-        // Start the timer
+        // Ensure previous interval is cleared
+        if (intervalId) {
+            clearInterval(intervalId);
+        }
+
+        // Start a new timer
         intervalId = setInterval(updateTimer, 1000);
 
-        // Set button event listeners
+        // Update button state
+        clickButton.classList.add('white');
+        clickButton.textContent = clickCount;
+
+        // Set up event listeners for the button
         clickButton.removeEventListener('click', startTest);
         clickButton.addEventListener('click', recordClick);
     }