Added a new code example for arrays (CodingTrain#3454)

Checkout the demo: https://editor.p5js.org/yathy2007/full/jdwQTinI1

_beginners/p5js/7.1-what-is-an-array.md

@@ -6,6 +6,14 @@ video_id: VIQoUghHSxU
 web_editor: DmwVbhOZ
 repository: p5js/7.1-what-is-an-array
 can_contribute: true
+
+contributions:
+  - title: "Array Elements"
+    author:
+      name: "Yatharth"
+      url: "https://github.com/yathy2007/"
+    url: "https://editor.p5js.org/yathy2007/full/jdwQTinI1"
+    source: "https://editor.p5js.org/yathy2007/sketches/jdwQTinI1"
 ---
 
-This video covers the basics on using arrays in JavaScript.  What do they look like, how do they work, when should you use them?
+This video covers the basics on using arrays in JavaScript.  What do they look like, how do they work, when should you use them?