Add JavaScript loops and iterations resources (#1604)

* Update 106-javascript-loops-iterations

* Update content/roadmaps/106-javascript/content/106-javascript-loops-iterations/readme.md

* Update readme.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/106-javascript/content/106-javascript-loops-iterations/readme.md

@@ -1 +1,15 @@
-# Javascript loops iterations
+# Loops and Iterations
+
+Loops offer a quick and easy way to do something repeatedly.
+
+You can think of a loop as a computerized version of the game where you tell someone to take X steps in one direction, then Y steps in another. For example, the idea "Go five steps to the east" could be expressed this way as a loop:
+
+```
+for (let step = 0; step < 5; step++) {
+  // Runs 5 times, with values of step 0 through 4.
+  console.log('Walking east one step');
+}
+```
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeText='Read' href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration'>Loops and iteration</BadgeLink>