issue fix

index.html

@@ -22,7 +22,9 @@
       </div>
 
       <div class="floorBox">
-        <div class="lift" id="liftBox"></div>
+        <div class="lift" id="liftBox">
+
+        </div>
       </div>
     </div>
 

js/app.js

@@ -10,15 +10,14 @@ let btn0 = document.getElementById("btn0"),
 
 function command(floorNo) {
   let checkNumber = floorArr.includes(floorNo);
-  if (checkNumber === false) {
+  if (checkNumber === false && currentFloor !== floorNo) {
     floorArr.push(floorNo);
     floorsArrP.innerHTML = floorArr;
   }
-  if (floorArr.length === 1) {
-    move();
-  }
 
-  switch (floorNo) {
+  for (var i = 0; i < floorArr.length; i++) {
+    if (floorArr[i] !== currentFloor) {
+      switch (floorArr[i]) {
         case 0:
           btn0.style.backgroundColor = "red";
           break;
@@ -38,14 +37,20 @@ function command(floorNo) {
         default:
           break;
       }
-
+    }
+  }
   console.log(floorArr);
+
+  if (floorArr.length === 1) {
+    move();
+  }
 }
 
 function move() {
   if (floorArr[0] === 0) {
     liftBox.style.marginTop = "680px";
     liftBox.style.transition = "5s";
+    currentFloor = 0;
     setTimeout(() => {
       if (floorArr.length !== 0) {
         floorArr.splice(0, 1);
@@ -57,7 +62,7 @@ function move() {
   } else if (floorArr[0] === 1) {
     liftBox.style.marginTop = "544px";
     liftBox.style.transition = "5s";
-
+    currentFloor = 1;
     setTimeout(() => {
       if (floorArr.length !== 0) {
         floorArr.splice(0, 1);
@@ -69,7 +74,7 @@ function move() {
   } else if (floorArr[0] === 2) {
     liftBox.style.marginTop = "408px";
     liftBox.style.transition = "5s";
-
+    currentFloor = 2;
     setTimeout(() => {
       if (floorArr.length !== 0) {
         floorArr.splice(0, 1);
@@ -81,6 +86,7 @@ function move() {
   } else if (floorArr[0] === 3) {
     liftBox.style.marginTop = "272px";
     liftBox.style.transition = "5s";
+    currentFloor = 3;
     setTimeout(() => {
       if (floorArr.length !== 0) {
         floorArr.splice(0, 1);
@@ -92,6 +98,7 @@ function move() {
   } else if (floorArr[0] === 4) {
     liftBox.style.marginTop = "136px";
     liftBox.style.transition = "5s";
+    currentFloor = 4;
     setTimeout(() => {
       if (floorArr.length !== 0) {
         floorArr.splice(0, 1);