Done

src/main/java/io/zipcoder/Music.java

@@ -5,10 +5,40 @@ public class Music {
     private String[] playList;
 
     public Music(String[] playList){
+
         this.playList = playList;
     }
 
     public Integer selection(Integer startIndex, String selection){
-        return null;
+        Integer upButton = pressUpButton(startIndex);
+        Integer downButton = pressDownButton(startIndex);
+
+        if (upButton < downButton){
+            return upButton;
+        }
+
+        return downButton;
+    }
+
+    private Integer pressDownButton(Integer startIndex) {
+        Integer secondCount = 0;
+        for (int i = startIndex; i != playList.length - 1; i--){
+            if (i == 0){
+                i = playList.length;
+                secondCount++;
+            }else{
+            secondCount++;
+        }
+        }
+        return secondCount;
+    }
+
+    private Integer pressUpButton(Integer startIndex) {
+        Integer count = 0;
+        for (int i = startIndex; i < playList.length; i++){
+            count++;
+        }
+        return count;
     }
 }
+