Keep the green light on

src/digicode.ts

@@ -27,11 +27,9 @@ function resetCode() {
 function composeDigit(digit: number) {
   builder += digit.toString();
   display.innerText = builder + '_'.repeat(CODE.length - builder.length);
+  light.classList.remove(IS_SUCCESS, IS_ERROR);
   if (CODE.startsWith(builder)) {
     light.classList.add(IS_SUCCESS);
-    if (builder !== CODE) {
-      setTimeout(() => light.classList.remove(IS_SUCCESS), DELAY);
-    }
   } else {
     light.classList.add(IS_ERROR);
     setTimeout(resetCode, DELAY);