Merge e7a007a7e8 into 08b771c863

Projects/1-Beginner/Bin2Dec-App.md

@@ -45,3 +45,4 @@ Try not to view this until you've developed your own solution:
 -   [Binary to Decimal converter using React](https://github.com/geoffctn/Bin2Dec)
 -   [Matrix-like Binary to Decimal converter using Angular](https://github.com/ZangiefWins/MatrixBin2Dec)
     -   [Live preview on heroku](https://matrix-bin2dec.herokuapp.com/)
+-   [Simple converter binary to decimal](https://codesandbox.io/s/bin2dec-bhy2y?file=/main.js)

Projects/1-Beginner/Border-Radius-Previewer.md

@@ -24,3 +24,4 @@ The border-radius property can have multiple values changed. Preview how the sha
 -   [9elements Fancy Border Radius](https://9elements.github.io/fancy-border-radius/)
 -   [Border Radius](https://border-radius.com/)
 -   [CSS Gradient Border](https://codepen.io/thebabydino/pen/zbqPVd)
+-   [Border Radius Previewer](https://codesandbox.io/s/compassionate-tdd-9rcqy?file=/style.css)

Projects/1-Beginner/Calculator-App.md

@@ -60,3 +60,4 @@ number.
 - [Javascript-CALC](https://github.com/x0uter/javascript-calc)
 - [Sample Calculator](https://sevlasnog.github.io/sample-calculator)
 - [Python Calculator](https://github.com/kana800/Side-Projects/tree/master/1-Beginner/calculator)
+- [Javascript Simple Calculator](https://codesandbox.io/s/elastic-field-29syv?file=/index.html)

Projects/1-Beginner/Christmas-Lights-App.md

@@ -30,7 +30,8 @@ displayed during the Christmas Holidays.
 
 ## Example projects
 
-[PureCSSChristmasLights](https://codepen.io/tobyj/pen/QjvEex)
-[Christmas Lights](https://codepen.io/irfanezani_/pen/mdeLpKo)
+-   [PureCSSChristmasLights](https://codepen.io/tobyj/pen/QjvEex)
+-   [Christmas Lights](https://codepen.io/irfanezani_/pen/mdeLpKo)
+-   [Christmas Lights for beginners](https://codesandbox.io/s/vigorous-paper-crjuw?file=/main.js)