solved #13: setTimeout, call f(x) every second for n seconds

solutions/13.js

@@ -0,0 +1,9 @@
+const customTimeout = (fun, n) => {
+  if (n > 0) {
+    setTimeout(() => {
+        fun();
+        customTimeout(fun, n-1);
+      }, 1000);
+  }
+};
+module.exports = customTimeout;

test/13.js

@@ -0,0 +1,14 @@
+const customTimeout = require ('../solutions/13.js');
+const test = (testNumber) => {
+  let i=0;
+  const countFun = () => {
+    i++;
+    if (i === testNumber) {
+      console.log(`Correct! Function repeated ${testNumber} times every second.`);
+    } else {
+      console.log(`Function repeated ${i} times.`);
+    }
+  };
+  customTimeout(countFun, testNumber);
+};
+test(5);